As someone who doesn't buy packs:
It would be nice to see f2p alternatives to the pack BPs. I don't mean that they should be as easy to obtain, but Magic Find (which looks incredibly powerful) now has 3 p2w options, and a premium hero with the skill built in. I'm still sorta hopeful that one of the new raid BPs will have this skill, but if they don't it would be nice to see some f2p options added. Even if it came from a primal chest, had a worse slot gear-wise, or took raid-exclusive mats to craft or whatever it would be nice to have something
f2p with that skill.
The number of permanent craft/quest boosts also makes me sad, but I understand that selling packs keeps the servers running so I won't whine too much on that one. Would be cool to see a handful of 1% ones available f2p, like on quest trophies or for a lot of gems, but I understand if that can't happen.
For myth vs legendary:
I kinda like that high level skills (both pack and chest) are hard to obtain, and I think dropping them directly to legendary (6-8x easier to get) would throw off the balance in a bad way, especially if it was only pack items dropped to legendary. I would much rather see a universal buff that makes it a little easier for everyone to fuse mythics, like reducing high level fuse times a bit or give 5 legendaries -> mythic a 100% success rate. Make it easier but don't make it easy, if that makes sense?
Another alternative might be to orient one of the monthly packs at low-mid game players, with a smaller skill on a lower level item - like OSD had support 1/mythic on a level 27 helmet. It might make packs more appealing to casual/lower level players who consider high level or mythic items unobtainable.
Anyway, f2p+ so my thoughts don't matter too much here, but that's my perspective on it ~