Until I can store my files locally on an iPad in a more useful way or streaming libraries are more feasible, I don't see myself making any changes in the too-near future.
You can store files locally! Djay Pro has come a long way on this front... (imo library management was unusable on Djay about a year ago but now works great perhaps to upgrades to both iOS and Djay). Files works great in Djay. You can also load in your iTunes library similarly which might be the way to go for larger libraries. Serato is still better for various reason, but this is a solution.