Yeah, Star Fox Adventures was definitely rushed. There's many good reasons to believe so, but never really did too much digging into that. The whole Dinosaur Planet / Star Fox Adventures ordeal was messy, and both Nintendo and Rare knew it. It was a grand game ! Loved it deeply !
Part of me says, it should've been a Donkey Kong game instead, certain thematics of the levels, having Animal Buddies in there basically, and the music just fitted Donkey Kong more than Star Fox. The Sharp Claws especially, they're basically Kremlings. General Scales is a skinny and way more sane version of King K.Rool.
Maybe that was more the problem with Rare, they where a bit too ambitious to be restricted by Nintendo and their franchises. They didn't really show the most love and attention towards Donkey Kong, one of the most legendary names and characters of gaming even before DKC, after DKC2. They quickly moved into their more ambitious Banjo Kazooie project, did Golden Eye (also didn't really bother doing James Bond too much beyond that), and yeah, basically wanted to have the most creative freedom as possible. Rare had everything going for them to basically become what SEGA was in the days of old, but shame, they didn't made it. Had they shown more interest in Nintendo's franchises, stuck with Donkey Kong more, tried their hands on other of the Nintendo franchises beyond DK and Star Fox, who knows what was possible for them ? Alas, we'll never know. But retrospectively, yeah it's not weird how things turned out.
But yeah, would I sacrifice Tropical Freeze, the biggest master piece of Donkey Kong beyond DKC2? I doubt it, it's a legendary platforming game with amazing atmosphere, music, style and difficulty even that's unmatched so far. Hard to compare it to DKC2, cause I still prefer that game, but... No I can't say I would want Rare DKC games before Tropical Freeze , seeing how things turned out. The possibility that Rare would again put way less effort into Donkey Kong than their own projects is just way too realistic to happen, in that given timeline of course. Even with this drought of DK titles I still confidently say, quality of quantity (this also saves a lot of money).