Have in the next DTP vanity slots fixed at 3 and command slots upgradable with levelling because the more you play here the more you need slots, cf Tie DTP inv slot gain rather to XP than to DP.
In the current DTP you can use EITHER cmds OR vanity, not both, except if you spent 100K DP to upgrade special slots. It is especially uncomfortable when trying to get all 4 direction commands active at once when not having over 20K DP at hand.