As someone who's an avid reader for BL, these covers you shown works pretty well. The thing is as a BL reader, those covers gave me the perfect dynamic relationship (such as who's the top and who's the uke)
Cuz some readers look at the cover and they have these expectation on who's the uke or seme, so when the cover is misleading (turns out vice versa), it turns me off to read it.
Take dear door and swallowing for example. Both of them clearly shows who's the uke and seme and what kind of story that we should be expected. Dear door, looking at the seme is clearly not a human while swallowing the black shade has them mysterious feelings to it.
If BL covers have these details, then I'm fine with it. It did a good job on giving me the details without me having to even read the synopsis. I just look at the cover and bam, you got my attention