Ok. Now to be perfectly honest.
The only way to make Autodesk decrese price for their products is to stop using them all togather.
Frankly at this point I would push Blender agenda. And not FBX format for blender, but Collada.
I know Collada is not standarized across any software (frankly FBX is also not standardized, the only “standardization” come from the fact that FBX is owned by Autodesk, which is not any standardization).
Best option would be to create external Collada import/export library on some liberal license like BSD, integrate it with Unreal and allow any DCC app producer to also implement this Collada library to their software.
I’m sure Blender and The Foundry with modo would be quick to jump ship on it. They already have nicely working Collada export, and struggle with FBX export.