I can't even say it's cliche or not yet because the story hasn't reached the important part (I think?)
For the plot, it's not really rapey since they almost did that and the seme isn't the one who do the rape thing
I have to agree. Like, it's hitting every typical trope.
Delicate frail looking light haired uke, check
Tall "cool" dark haired seme, check
Rapey rapey save the uke plot, check
The only thing missing is the uncomfortable 'not sure if seme is raping or this is consensual' sex scene and 'possessive seme' time. It's just... I don't know... made a little dull thanks to it's predictability, so far. Maybe it's the plot, setting, and characters all together that make this a bit dull ;;...
..but how do you like this? I'll never come to love this particular violent rapey plot, where the uke needs to be saved by the seme, it's just like shoujo
Nonetheless some omega-verse manga are well written (and less cliché)