lol, no. Not even. Try stripping the fetish goggles off. Blender is as good or bad as the rig is manipulated, and that goes for SFM as well. Neither is magic bullet. Speaking of rigs, Source's limit of four impulses per vertex is also hard
The fact you're even mentioning SMS/Drill isn't helping because once you know he's just using sped up tweening interpolation to make large movements, the "realism" wears right off and isn't even all that realistic (you schlick someone's clitoris that fast during the start of foreplay and she'll tear your eyes out, not moan in the throes of absolute ecstasy), never mind a couple of animation swipes are sourced from literal pedophile content for the SHOCK! CONTROVERSY! EDGE! You know kinda like FOW did to drum up all that noise. Furthermore, Rape isn't intenstity, it's just rape; nevermind the part where your premise is "super intense super intensity" but mean while the not SFM and totally UE4 with hyper generic lighting are also as you say
" very slow, basic, sex scenes, lacking any real intensity compared to something like FOW's SFM movies"
You're gonna have to pick one. Either FOW's animations in this game are not up to your standards as you posited them to be, or your standards are very dependent on what kind of argument you're trying to have.
Meanwhile back at the subject a hand, 22 bux for 14 second non branching "slow basic sex scene" animations is... dubious. At best. Which falls squarely in line with FOW's reputation, which they earned over a period of seven years with consistent behavior. Currently, that behavior doesn't seem to have changed very much despite the new youtube friendly marketing.