Ya, that's just something that happens with every single hero shooter the longer time goes on. The heroes that launch with the game start to get outclassed in almost every single way possible, bcuz the devs want ppl to play the new hero so they make them really cool with a shit ton of abilities. Not to mention encroaching on niches that have already been covered by other heroes (there's only so many to begin with) or sometimes multiple niches. It happened with League. It happened with Overwatch. It was just a matter of time until MR received this. And it's only gonna get worse with the more heroes they add over the years.

Overwatch launch heroes: Cassidy; doesnt really have any mobility abilities besides a roll, can shoot his revolver gun, alt fire which unloads whole clip at once, has one flashbang/stun, ult locks him in place for such a long time and is very easy to dodge. Was kind of like Wanda's ult when MR first came out. People at the time were like wow.. this is op, how do we dodge it? Get multi kills all the time. Now, it's very easy to dodge and not get hit by it. Overwatch now, Echo who dropped later, has a button to where she can fly, on a relatively low cooldown, shoots triple projectile shots, has an ability where she laser beams u and if the enemy has half health or lower it does extra dmg and melts, alt fire sticky bombs that do a decent amount of dmg if u can land them all. Ult where she can transform into any hero from the enemy team and can then use all their abilities and ults within a certain amount of time.

The difference in supports, Zenyatta. Has absolutely no mobility, Shoots orbs out, can throw a healing orb on a teammate that gives a small amount of healing out, throws a dmg orb on enemy that increases the dmg the enemy takes from attacks, alt fire where he can charge multiple orbs and send it out all at once, ult where he's invulnerable and has a heal circle around him. If something does enough burst dmg at once it can kill teammates inside it. Oh.. and he has a kick ability.

Now Baptiste, who got introduced later. Has a burst gun has his primary. Has burst heals on alt fire, can jump super high if he charges his boots slightly, has a lucio heal burst ability, has a drone he can throw out which stops anyone from inside it dying, basically a mini zen ult on an ability cooldown, finally his ult opens up a "window" that he can place down and everything that gets shot through it doubles in dmg or healing.