The AMCA egg with 100% ToT and IPR will become an Indian egg, so it's not going to be a factor.
Eventually, sure. But over the course of a 10-15 year development program, the JV partner can create roadblocks at any step.
M2000I comes with 2 MCs, MDPU integrates core avionics and weapons systems and HAL MC integrates plug and play systems and acts as a translation device between French and Indian systems. The Rafale could become the same. The only thing extra on F-35I is it comes with some airframe modifications for Israeli antennas for comm and EW separate from the F-35's core avionics and comm, we don't need that on Rafale and M2000. Neither the Indians nor Israelis get access to core avionics.
It depends on the scale of the JV too. Rules will be different for equal partnership versus a junior partner. I'm thinking it will be the latter for the IAF.
Whether it's a JV or not, we will need 100% ToT for the airframe and engine, at least when combined with our own tech for denied tech. But if we replace the core avionics with Indian as well, then the business end of the JV will die due to lack of European workshare in the Indian version. That's why I think we will aim for 100% airframe and engine tech while using Europe's core avionics with some of our stuff jacked in from the side. This would also be the fastest.
SCAF's out and GCAP's workshare has already been decided. So a 5% junior partner or just an import partner is the best we can hope for if we join GCAP.
ADA screwed the pooch here. They are 5-10 years behind where they should have been right now.
Assuming we are serious about FUFA as a prospective roadmap, taking the 'quickest & cheapest' method to get a local airframe/engine production/assembly line for FCAS should be a-okay.

