Sure, there were plenty of complaints about the TVR and Ferrari, but I had never heard anyone complain about Forza Edition cars being locked aside from the occasional muttering about the exclusive bodykits. A perfectly good solution could've been simply adding those bodykits as conversion options for their standard counterparts; this way they could appease players who only want the unique bodykits, whilst the rarity and credit bonuses of the actual FE cars keep players coming back for Forzathon challenges. Instead, not only have FE cars become readily available, but a lot of them are so cheap that they're not even worth selling on the auction house if you've been collecting duplicates (hell, the '93 SVT Cobra FE is 27000 credits cheaper than the standard car now). They didn't even unlock the MG MGA in the meantime for some bizarre reason - is that not worth complaining about if you're a fan of the car?
I'm not going to pretend there's a magical solution to every problem that will fix everything, but Turn10 seems to be particularly good at CREATING dichotomic complaints. When players complained about rammers, their initial solution was to ban SUVs from racing online, and then not even return to that rule, since the Barrett-Jackson Ford Bronco hasn't been banned; when players wanted more than a week to grab an exclusive car they wanted, their initial solution was to put the speciality dealer on a loop for several weeks where no new cars were introduced; now when players have complained about a handful of locked standard cars, their solution involves unlocking the cars that were functionally designed to be unicorn cars that many players enjoyed unlocking, collecting, and selling. Just because a solution exists, it doesn't mean it's a good one - if you asked me to fix a squeaky door and my solution was to remove the entire door, would it be dichotomic to complain about how drafty it is all of a sudden?