From their comments on other threads I'm now thinking a lot of these figures are placeholder and am not reading too much into them. The reason I questioned the identical costs for different mechs initially was because I had assumed this figure would be an abstracted sum of various costs related to the upkeep of the mech which would seem to vary widely between a Wasp and an Atlas, eg in the last Q&A they said we wouldn't have to buy ammo to resupply after a battle, that it would be "covered by upkeep costs".
So I'll wait and see how things turn out in the final game, but am expecting a bit of variation tbh. It just feels right that if we have bays full of assaults instead of lights our ongoing maintenance and operating costs will be higher - they are bigger, have more parts to service and should use up more consumables (incl ammo in some mechs). I recall discussions early in the project about how it was great to get bigger and more powerful mechs, one just had to be sure one could afford to keep running them, and I guess I assumed this related to more than just repair costs. But then again we're operating on limited information from a few screenshots - fun as the discussion is - perhaps the abstraction they're using puts all increased costs of running bigger mechs in the repair cost bucket.
