It seems clear to me that even if there are no further updates for Tiramisu, that it can continue to have an appeal if some of the things Aroma breaks never see alternatives implemented. Pretty much Tiramisu can exist for the people clinging to CBHC, afraid that something they have working just the way they want wont be achievable in Aroma.
To those afraid to change from CBHC to Tiramisu, I gotta say, I've been fiddling with it, and I can only think of one thing that Tiramisu can't quite do that CBH can (at least at this time): how custom CBHC setups could allow for specific homebrew apps to boot at launch by holding specific buttons when you turn on the Wii U. However, Tiramisu brings back the quickstart menu (which CBHC notably can't utilize), and if you make channels for your favorite homebrew apps, you can still quick launch into them from a boot, this time with a simple touch on the screen instead of a hold of a button. So I'd still say Tiramisu comes out on top overall, definitely seems to load up a little quicker too.