A few points:
First, opinions on subjective issues like tone, mojo and playability are relatively worthless to anyone but the guy making them. I consider this a waste of time. I'd rather stick to objective matters, such as QC, parts and materials, which are not matters of opinion.
The MIMs have parts and materials that are comprehensively cheaper and inferior to the corresponding MIA models. The last time I checked the parts lists, the only parts the MIM "Standard" and the MIA "American" (not "American Standard," which ceased production in 2000) had in common were the pots and jack. Does that mean that the MIMs can't sound and play well? No, but it means that the MIMs are cheaper for a reason and that they are different instruments from the corresponding MIA models - not the same instrument made in different factories. They are completely different instruments that superficially resemble each other.
That said, I don't know how Ensenada can possibly turn out worse QC than Corona currently has. Corona fret detailing is typically appalling - including the worst I have ever seen on any guitar or bass at any price point in over forty years - and the neck polyurethane finish is so ineptly applied will start peeling off within a couple of years, whether you actually play the instrument or not.
Fender will not warrant finish peeling, claiming that it's a climatic problem. It's about 10% climatic and about 90% poor prep, mix, application or curing. A Fujigen Gakki Fender Japan instrument sitting in a stand right next to the FMIC instrument will show none of these problems with its polyurethane neck finish.
QC is a management decision and can be turned up or down at any time, just like a thermostat. The current Corona output is worse than anything I ever saw come out of CBS, and it's because someone in FMIC's executive level decided it made good economic sense to ship trash for a while.
It appears that Fender Ensenada is attempting to better their QC while Corona is letting theirs slip. More and more production processes are moving to Ensenada from Corona. What does this all mean? Who knows?
Here is a very nice photo spread on the Invalid Link Removed done last month by my buddy, Mark Wong. Mark's become a fan of Mexican Fenders.
Personally, I'm buying no more FMIC product until the QC and warranty business is straightened out.