In some cases, I think the various romantic arcs suffer from being spread too far apart, which is kind of a problem for the game in general. Main story missions and companion stuff is kinda stretched across the game, and depending on how much side stuff you do, it makes the progression for the crew relations feel kinda stretched out.

That's how it felt for me, anyway, and I did Peebee's romance, which is one of the more well developed ones according to what I've read here and elsewhere.

For romance arcs that aren't as fleshed out, I imagine the problem would be considerably more noticeable.

There was also the problem that there wasn't anyone I really wanted to romance. I was leaning towards Suvi, but opted for someone that was actually on the crew, and decided that Peebee seemed like an ideal choice, and it worked out alright. I kinda like her character and how she progresses, but there just wasn't that deep connection there.

And I think it'd be hard for me to romance a lot of the other characters. Suvi I'll probably do on a future playthrough, but Vetra feels more like a friend than a romance partner, and though I don't hate her, I didn't care much for Cora's character. I don't like Gil much at all, and Reyes isn't in the game nearly long enough for me to consider anything with him.

I was kind of let down from the beginning - I was hoping for a female human squadmate LI, of which there haven't been any in the series so far (still disappointed that Ash wasn't in ME3.)

I also didn't connect with the new crew as much in general, but it's still too early for me to tell for sure. It took me a while to warm up fully to the ME2 crew, much like it took me a while to warm up to the DA2 crew after playing DA:O.

I think my biggest complaint is that they went all out for some of the romances - full nudity cutscenes with surprising detail for an ME game (maybe not as full on as the Witcher, but still). And for others, it's just a fade to black moment. That's kind of cheap. I'd rather they fade for black for all or have SOME kind of cutscene for everyone.