Pattern Sequencer: I assume you mean a Pattern Step Sequencer like that of FL Studio. Thats not in this program, it’s more like Reason or Logic in this aspect. The Piano Roll still works great, in fact in my experience more people like editing this way vs a step sequencer, more control overall. Plus, in Podium you can change the PR to Drum Mode, there you have Note Names.
Velocity: Look at the bottom of the PR.
Swing: Select the midi notes you want to adjust, right-click ‘adjust midi timing.’
Duplicate: Hit Insert or ctrl+mouse drag to duplicate.