I would still have an issue with this.
The issue isn't the use of tokens, mods, or even loot boxes for me. The problem is you can "feel' the intention to force even "better than average" players to feel that they can either enjoy the game by purchasing these loot boxes or go through an MMORPG style grind of epic proportions.
The problem is that the balance is off. I don't say this as someone who is historically against loot crates etc. I am absolutely ok with them. To say they are a slippery slope though is an understatement. With many of the interesting (and I would have to say IMPROVED) additions to Forza 7, Forza 6 never felt that you HAD to use Mods. When you did, you'd have a few lying around and you could enhance your experience (either to make your race more interesting or maybe to make it difficult for one race to test out the waters.) In Forza 6 Mods felt like a really cool way to elicit racers to try something new with only minor risk, making enjoyment paramount. Yes, you could use real money to purchase more packs, but you had "some" and for those people it worked well. You wanted to earn EVEN MORE, sure, pick up some more mods.
In Forza 7, MUCH of this also centers around the removal of the race preferences removing credit bonuses. In doing this, you say, "that extra income for trying harder things... GONE." (It should be noted they kept the drivatar bonuses but with the inclusion that it's also faulty in that drivatar aggression is turned off so it's really a minimal change for little payoff.)
I won't shit all over the game. It has some cool improvements. Those people that say that everything is tuned to the loot system however are absolutely right. Even those cool improvements all aim to dump money into the system. I don't care developers want to get as much money as possible, that's their bread and butter. I just care when it feels decisions are made to undermine the fact people purchase the content at all. And in this case, being a Ultimate Edition purchaser (physical at that), man... the list of shortcomings is high.