1) i wouldn't say their best, but their music is the most i care about.
2) well i gave up on that a little while ago and it was like if they can trash talk i can too and the best bands are new school not sure about (old ayabie, rentrer en soi)., and i discredit new bands too, like mejibray, girugamesh, deathgaze were recent. also and newer band they took from and upgraded. with grieva it's old and new diru since reload is early grieva. but with Lycaon i already said what i had to say about kiryharu (w.e his name is), and of course there is dahlia, Yuuki and satoshi destroying old school in one fell swoop, bands like grieva too. as for the rest of Lycaon's disco, sounds like it fits new school.
3)oh hell no here is where you totally lost me. They miles above some motherfucking repackaged Asian Limp Bizkit. "they're more aggressive now than they've ever been before" ummm sure. instrumental wise with the new metal songs they are neck and neck, but the old ones take it for sure because yuuki's not screaming. "juvenile cries and growls" bullshit, Yuuki's diaphragm is very special, it may not allow him to gett deep, but at the same time it makes his harsh unique the best i've. and it is powerful cause it's carries all of yuuki-sama's rage, pain, and frustration in it, better than anything cannibal corpse, or white chapel let out. even like it better than alex terrible (which vocals are so damm good*drools*). yuuki's 2011-2013 screams are great too not as strong to fit the music.Yuuki has always been the undeniable front man. while i'm here either way Lycaon's pretty weak now or back then, that's why I'm hoping for a brutal track so they have everything.
4) is there really a fine point though? they are always on the move, never standing still. and as i said before there is no better or worse, just expansion on what they can do.
In short: Lycaon made and makes the best music, no other artist, group, and or band gives as much pleasure. but they still need to do somethings to become totally untouchable. i have doubts that this will change though because of number of reasons.