Sylas is honestly just a lazy design - nothing about him is really interesting
AOE passive
Mobility attached to CC
Heal/execute spell
Steals your ult
I’ll at least say I didn’t read his lore because I stopped following lore awhile back, so I’ll refrain from that (but let’s be honest, he’s a Sirius Black wannnabe).
The only “interesting” aspect to his kit is his ultimate, which isn’t some novel concept. People have been proposing champions with ult steals for years in concept designs (player base-wise), the only difference is that there’s so much outrageous shit in this game that nobody even bats an eye at Sylas now. So in other words, you’ve just laid out a really boring kit with “shock value” rather than actual zing. Yeah, you’re basically Family Guy. You’re not really even funny or original anymore, you’re just living off old glory.
At least Neeko was interesting though, but still more of the same - le gasp, sneaky sneaky teehee aoe ult wow.