When Jesper left the band, In Flames ceased to exist. It became something else that is just called In Flames. Jesper was the driving force behind the music (along with Björn) and what is left if the main ingredient is taken away? Something different. It's 50% In Flames now...
Even the guys who bash on commercially successful IF are generally like SOAPF, so based on this, you are actually representing one of the most radical views towards IF. That alone should be a signal for you.
And how can you take seriously what I just quoted from you? If Jesper was the driving force, basically none of the albums post Clayman would exist, though even Clayman is debatable. Jesper and Björn did the music, and since I've never been there to any of their recording sessions, but neither you, let's assume their contribution musically has been closer to 50-50, than, let's say, 80-20 - a ratio where we could call Jesper a driving force. Now add Anders to the mix, who can be most obviously blamed or praised for the break up with Fredrik Nordström and his production, which, if after Clayman people weren't sure enough, meant a quite big change in their style.
The music remained heavy and melodic, so it's not like you can point your finger on R2R and say "okay, this is where melodic death-metal stops!" Especially since that album had some of the heaviest stuff in the discography up to that point.
Anyway, documentaries 30 years from now decide when did the melodic death-metal died out from IF. The point is, In Flames was Jesper, Björn and Anders, so don't put Jesper on a pedestal. Jesper's last real album was CC, you can really feel on that record that shit has been put together. Even according to Jesper, he did not enjoy recording ASOP as well, the differences between the band members (or some of them, once again, none of us knows The truth) have reached the point where they hated to work each other. This is what Anders meant with his friendship statement about Jesper in one of his interview: it's basically like a marriage gone wrong; if you finally divorce, you can actually remain friends and hang out and laugh and what not, because you love each other in a way, but if you force yourself to stay in the same house with the same problems for ever and ever, then you can't help but hate the other one.
Don't forget that Jesper has recently admitted his problem with depression. I've been arguing about his childish outbursts, but that actually explained everything. Now, I have lived with someone suffering from depression, and in case you don't know, it's like hell. You can grow to live with that person, but if you actually want to be close with them, like working together, you have to be the most patient man in the world. Beyond every expectation actually. I don't think Jesper wanted to leave In Flames, he just became a huge ass obstacle for everyone. If you suffer from depression, your self-esteem is non-existent and you project it onto others all the time. Now add alcohol, his coping method in the mix, and that's not exactly the recipe for a fun time.
Knowing all this, after ASOP I wouldn't even say they lost 33% of the creative force behind their music. Not only Jesper clearly did not like to contribute to ASOP - he said it was a chore, like a mundane job or sth -, Anders and Björn must've still made compromises because of him.
I appreciate that you try to apply math on humans, but it's not how it works. You and me are not a stream of 1s and 0s.
Anyway, pointless to reply to you, because you are either legitimate dumb (or very young, but that's like the same), or just trolling around acting as "NO1 IF FAN SINCE 1940!!!"
edit: unless you actually try, of course. In no way would I want to shut down anyone, but at this point, all you did so far is digging your nose without even trying.