I think a lot of maps on MCSG should be re-tiered. I agree, Icarus needs to be re-tiered, but only after breeze...
Maps on MCSG that desperately need retiering.
Breeze Island: about 3 tier twos on the entierety of the map (besides corn)
Valleyside: All the tier twos are in literally one small section of the map, and the the rest is just tons of tier ones.
Moonbase 9: Same problem as Valleyside.
Teweran SG1: As far as I know, the only tier twos on the map besides corn is the double chest under the dragon.
Wyvern's Wake: If this ever gets re-added, they need to fix the insanely OP route. It's not just the Diamond sword and XP bottles that makes it OP. There are just too many dang Tier 2s.
I don't know if it's just me but I tend to have fairly balanced games on Icarus, it seems like there are many different routes to take and there are always at least five other people besides me with full or near full iron.