If you have much spot removal or ways to protect the Titan he is a little better but really he doesn't need improving, he is plenty over powered as it is
Across the 37 new Tyranid creatures in the deck, there are plenty of ways to build not only a wide army but a tall one, with the ability to cast naturally large creatures and pump up your little ones with extra counters
Slurpuff looked very innocent when we first saw it and a little bit underwhelming as it "just" gave an extra card each turn
That permanently caps supply
A card which is extremely good in one of those formats and dominated still has to carry over here, and not all cards do
Wilt-Leaf Liege, which also buffs green and white creatures, and Tolsimir, Friend to Wolves slot right into a Tolsimir Wolfblood Commander deck