Few Suggestions - DISCUSS ONLY!

[EaglePhoenix]

Exp, drop, etc - you get from VIP.

Options in IM lasting 2hrs isn't a pay to win, it's only a sure way to go bankrupt but that's not the point. Thing is, it's too much for upkeep on a daily basis - so basically you do not do it.
You also do not necessarily need it. Either how, some can be bought ingame. I'm not opposed to options like DD to be sold ingame at a lower rate (say 10-15% vs 20% on IM) or absorp (1% vs 5%).

Current IM is far from P2W ..

Also, what are you talking about untradable IM - you can trade preservation stones, lucky stones, etc. Plenty ways to make crones from IM and for people to be able to also forge through crones with IM advantages.

Plus, regardless if you spend RPs - you still need tons of crones to forge/enhance - so IM only will get you nowhere.