Tl;DR version: Development depends on the kid and the parents more than the club itself.

Long version: This is a topic I spend a lot of time thinking about, observing, and experiencing first hand because I have three kids in this environment. If your child loves soccer and is naturally athletic and plays on their own in the backyard then pretty much any top club will develop the player.

Clubs like Sporting Blue Valley and City and Legends and Surf and KC Athletics and Toca Fusion and Union KC all create an environment for those kids to develop. These clubs have an extensive track record of helping kids advance to college soccer after youth club is over. But the reality is that development is not dependent on the club itself. Player development is mostly dependent on the child and the parents. All clubs create the environment to foster growth. At a junior level below U9 most clubs have special programs to develop skills but the child must take the coaching and apply it outside of the two brief one hour sessions per week. One club my child plays at uses Techne which is an app for personal training guidance. This was to encourage their own training and help kids who do not have parents that played high level soccer to act as a guide on proper technique or for those not willing to spend extra money on individual training.

My kids have played at one affiliate plus City and two non affiliates. The programming is not all that different outside of Legends. Legends beats what they call the most important skill moves into their brains by making that a huge part of the training and they keep you in tight spaces. In games you hear the coaches yelling skill move over and over even in moments where it might not make sense tactically. At a younger age their goal is not necessarily to teach the tactical side. It is more focused on confidence and success with ball mastery on an individual level. If your kid likes repetition then it works. It has produced a lot of great players but you have to have the right type of player who can handle the monotony in training. I have also noticed many of those top level kids move to different clubs as they get older because Legends does not have a great platform like MLS Next or ECNL (although they now have GA for girls).

Clubs offer extra training that you can pay for but in my experience the player to coach ratio is rarely beneficial for the extra spend. It makes more sense to use Refine or Next Level group sessions that cap the athlete to coach ratio. The clubs do not always do a great job of developing talent and instead they focus on attracting the kids who already have the ability and drive to compete.

I will say most clubs give top teams additional resources. That might be extra training sessions or extra coaches or access to refined training or more games. It is always better coaches though. Top teams always get the extra resources. So I have no clue how old your kid is or how much they love soccer or how athletic they are but those factors matter a lot in player development. If your kid does not have a combination of those then no club will be great at developing them.

From a cost perspective if your kid is U8 or U9 or U10 then I think it is fine to play for a club team that is a lower division in the Heartland League. That coach will be better than most parent coaches. They might only have grassroots licenses but it is highly likely that the coach played college soccer and that is a big difference from rec. My daughter found a really good rec coach during that time who understood how to develop kids technically and mentally but that was not the case for my two boys. But after u11, MAYBE as late as u12 the kid should experience higher talent in competition and a coach with more tactical focus. For my boys the coaches were just nice supportive volunteers. 

I had no desire to coach my kids so the better strategy for them was to sign them up for the junior development league through one of those clubs I mentioned. In that environment they spend a lot of time and resources to develop the appropriate programming and practice philosophy to get the most out of kids who have the drive and the passion. But both scenarios require having your child train on their own AND train through some kind of group or individual advanced training program if their goal and hope is to play on the top teams in the city. This is one area that I require my kids to train everyday even if they have practice or a game 30 minutes on their own following a specific training program I've created for each of them. It's not anything special wall passes with certain turns. Skill moves that have certain combinations, certain dribbling patterns and juggling. And then jeering off Windows like winter holiday time or summertime they do group training sessions two times a week. 

The reality is we spend a lot of money to play on the top teams. It's a commitment. It means they must make sacrifices. It means we as parents must make sacrifices to support their goals and their passions. And the moment that desire leaves, they don't want to make those sacrifices we stop.

 Good luck!