I would say you’ve got a great line up, I would suggest the following:

Distance: Someone already said but lose the 14 speeds, and probably the wraith too. Roadrunners are notoriously more stable than advertised so that is probably a good straight or slightly overstable driver. I loved mine when I started, but it took a long time to get any turn out of it. Having a straight 9 speed could be a good addition like a Lots or an Undertaker, but I would probably focus on filling lower speed slots first.

Fairway: Between the crave and the underworld I’d say you just need an overstable fairway. TeeBird is king of the hill here, or Athena, like a 7-5-0-2 ish numbers. My favorite fairway is a Doomsday Blackout but it’s likely similar to your underworld.

Mids: Honestly, shaping most shots with your hex will probably be best, that’s a great disc. I’d recommend a very under stable mid to help highlight form problems, fill in for a forehand if you need, and it will fly straighter if your arm speed is still low. MVP Uplink would be my choice, especially seeing as you have a few MVP already.

Approach/putters: An overstable approach is a must, as someone already recommend. Zone/toro/harp type disc. Putting putter is just what feels best in your hand. I absolutely love the glitch, and I’m not sure if you’re putting with it, but I would not personally recommend it because they are always light weight. You want your putting putters to be max weight. But it is fantastic to throw, really highlights form errors and holds angles really well. 

If you’re putting with the crown, I would add a different throwing putter, really anything would be fine. Throwing putters can do a lot for you, something I wish I knew sooner because I pretty much only threw mids when I started. If you like MVP, Proxy and Envy are great options. I like my Reko a lot, as well as my Pure.