Bloomburrow brought a surprisingly large number of changes to my cube.

Stoat is simple, clean, and effective.

Plumecreed is amazing - best card in the set for us.

Shoreline is an upgraded Looter.

Fell is sorcery-speed, but clean and unconditional.

Thought-Stalker I'm willing to test. I've never leaned into discard, but this one encourages some aggression to get full value.

Brazen Collector asks red to be aggressive to ramp.

Wolverine trades blowing up lands for an option to support +1/+1 counters. Also, the 5/4 body encourages attacks to speed the game along rather than hiding behind a 2/2 deathtouch blocker.

And Lilysplash brings Simic up to 6 guild slots (like the other 9 guilds). While blink is more an Azorius thing, it should work well here, too. As a 4/4 reach, it gives flying an obstacle, and it also supports the +1/+1 counters archetype.