Yeah, but if the suit looks awesome with feathers (which I think it absolutely will) it doesn't detract anything from what you want to think Dinosaurs should look like. The Rider and the dinosaurs themselves are separate.
Also. I don't think feathers RUIN dinosaur designs. Feathered dinosaurs just don't look like the ones you probably grew up learning about. I'll bet that you don't like them as much just because of the change; that they're different from what you're used to. Granted, there's nothing wrong with that, but it doesn't mean feathers are bad or that dinosaurs shouldn't have them because of your personal preferences.

GO TEAM FEATHERS! :D

I dunno. I just don't think any suit would look good with big hero plumey feathers.

Also, I HAVE seen good feathered dinosaur designs.
The problem I have with them is that they're VERY few and VERY far between.
And what fills in those gaps just looks like an abomination.

and if they are feathers, they can't just have the stem. they'll look like they might as well have been glued on.

Is there tyrannosaurus in that suit? Following Tyrannoranger, Abared & Kyoryured?

I don't mean cover it with feathers. Or even have ACTUAL feathers anywhere. Just like, feather motifs in the armor and on the helmet or whatever. Like in that first picture on the legs and V fin.

It's supposed to represent the theropod class of dinosaurs, so it does contain T. Rex elements in it along with elements of other carnivorous dinosaurs.

The color is perfect Yuu, exactly what I had in mind. The helmet is better, but can you add some teeth in it to make it more carnivorous looking? Maybe make the eyes a little jagged with teeth in them? It looks excellent anyways. I personally don't think feathers will work with this design for the thero form, but maybe with the others.

The forearm guards were supposed to resemble carnotaur horns

But they're already there on the legs. And they already work. Just more of that. Not MUCH more, but a little bit. My point is to subtly integrate feathers into all the forms as a common trait among them. All but Aqua of course, because those are technically different creatures entirely. I just think it'd set our suit designs here apart from all the other dinosaur themed Tokusatsu costumes and make things just a little more unique.

I'm not sure he needs the Carnotarus horns on the arms there given that the Carno power up will add to him already with back spikes and whatnot. The ends of his forearm guards (where the spikes are now) would be a great place to add a similar feathered accent like on the legs. Also, I sort of liked where you were going with the feathered V fin on the first design, but maybe you could integrate something like that again and tweak things a bit?

those aren't really feathers as they are just big spikes. REAl feathers would be plumey and not be as much of a point.

also, if you ask me, the first helmet looks like it would fit a secondary, and the 2nd helmet looks more fitting as a main rider helmet.

How about this, how about we save the feathers for the secondary/tertiary Rider. Because I'm sure one of them will have a bird-related form.

You know speaking of the secondary rider, I think its quite fitting that if his motif is prehistoric animals, his final form could be evolution themed as to Paleo's extinction themed final form.