I’ve only played a few hours of Three Hopes (because the music and presentation always makes me want to go back and finish my maddening run of Three Houses), but it doesn’t have any dating as far as I’m aware. But there are supports you can earn from pairing up with a character so support convos are there if you want it. Three Houses’ ‘dating’ is blown a little out of proportion, there are a lot of support conversations, and an optional tea party guessing minigame, but relationships are a lot less diagetically important than many FE games. I think because it’s voice acted and scenes go on a bit long, people put more of an emphasis on it. But you can easily skip them and not miss anything.
Do it! Both are great games though Blazing Blade is my favorite of the two where you play as Roy’s dad Eliwood. Roy is just there as a cameo. If you do play Binding Blade to play as Roy, don’t be discouraged by the low hit rates! Once you get Rutger you’ll be able to really use the low hit rates to your advantage. Roy himself is not meant to be a powerhouse of a unit, he’s supposed to grow into the role during the course of the last few chapters, so don’t be discouraged by that either.
There’s also the Project Ember rom hack which balances things a bit more and makes more units viable if you want to avoid some frustration. Just remember to use the weapon triangle, it’s much more powerful in that game than FE8.
Not a lot but I played Sacred Echoes which is the GBA remake of the 3DS remake of the NES game. I also played the Shadow Dragon 3DS remake for the novelty, but idk FE11 is fine, you probably shouldn’t play this over that. And of course, I love a randomizer and someday wouldn’t mind building my own romhack!
As far as total overhauls though, I’ve read good things about Vision Quest!