I have gear hub tier 4 unlocked. I should be able to use tier 4 weapons from the gear hub, or the other legendary weapons I have, without having to worry about agregious mismatches.
The reason I keep asking is because I don't buy your excuse about flexibility. A limit on power rating difference between builds, say the highest rated build I have can't match with players who've got stuff with 50% higher power rating, won't even change the flexibility that much for people playing normally.
The current state is actually LESS flexible because I MAY be able to equip legendary weapons to a common or rare mech that doesn't mean it's optimal. But if it's not optimal to equip legendary weapons to rare mechs then why are they in the same tier? If it not optimal to use some lower end legendary with higher end rare or epic then why do you sell and give legendary things at 3 stars?
You would still be able to equip legendary weapons on common mechs. It would just make it so it's not so flexible it can easily be cheesed. Like my hangar there in that thread, that is actually trying to make each slot useful, wouldn't be going up against FREAKING MAX NOMADS just because their hangar overall has a similar rating due to the fact they used all 1 and 2 star mechs and weapons to fill their other slots.