I've been accepted into tier 3 for almost 2 weeks now...and honestly, it's quite painful.
By no means do I have the best gear in the game*, but I'm not entirely unsuited for the content either!
Yet, when I get hit (don't tell me you can dodge everything, YOU try dodging crossfire from T3 Puppies with the 5-6 beam spread multiplied by 7 puppies when you're frozen and surrounded), it feels like my very soul was rammed head on by a truck...attached to an equally sizable truck...attached to a freight train...attached to...you get the point.
I'm not saying it's not fun (maybe I am), but it's considerably less fun than tier 2. Less fun, more pain, and not that much of a gain.
Gain as in crown/heat. It is less lucrative in terms of Heat when venturing down into the lower depths of tier 3 than tier 2. Crown gains? I have a hard time keeping track of that, but in my opinion, it's not worth it.
Gaining rare material? Maybe...MAYBE worth it, but not by much.
Scale down the damage! The top two tiers are great! I'm having a BLAST with this game! I love it!
Make it more forgiving! If I have the appropriate gear, I want to feel somewhat powerful, not shivering in my flaming boots (with the exception of graveyard levels, yeah, I scream when I get chased by 5+ phantoms with their Divine Avenger-fied Gran Fausts, LOVE IT, HURTS SO GOOD!). BIG SWORD GO BASH BASH. Or make it more lucrative! More rewarding! I like being rewarded for going through the depths of he--...clockworks and being able to come back in one piece.
Maybe I suck, I don't know, but right now for an average player, the lower depths are too painful to be worth venturing.
Blah, whatever. Point is, tier 3 isn't fun. Not for me anyway. Not by a long shot.
looks like someone needs to play Touhou =)