Many great ideas! And don't apologize for posting. I love input. :)
I'll give you some short (and immodest, considering your detailed post) answers, because my "MoR designated" time is rather limited right now:
Combat:
I had plans on implementing melee fighters having to pass through enemies that are placed in the close combat slot before reaching the distant combateers (a form of "tanking"). But I almost like your idea better - which would give some love to the melee class as well. Which I agree is pretty underpowered right now.
A combat upgrade is still far away, but I'll patch/balance it and add new weapons that'll hopefully make melee more interesting.
Crystal hills will have stronger armor and a power katana blade that'll be the assault rifle of the melee class. Meleers will also get many special attacks that further enhance their combat ability after the MC discovers some personal trainers or apply to a boot camp.
Overlay quest UI :
Interesting. Will look into this.
Mentor tutorial:
Very interesting! A hirable merc, or maybe your brother's old gate keeper? Will look into this as well after getting other systems stable.
I'm currently working on a wiki that'll give newcomers many excellent hints - as a placeholder until a decent in-game tutorial.
Thanks!