No. Aftertouch is a must for all synth players. Polyphonic aftertouch is the ultimate. But if you want to cut the apple in two, and, for some patches, really want that no one miss a particular expression, you can always duplicate the AFT action similar to what does the MW.

How important is aftertouch on a MIDI keyboard?

Aftertouch is a convenient, ergonomic way to add expressiveness to your playing. ... Because it's expensive to design and manufacture, generates a lot of MIDI information, and requires a certain dexterity on the part of the player to take full advantage of it, polyphonic aftertouch is found on relatively few keyboards.

What does aftertouch do?

Aftertouch is MIDI data sent when pressure is applied to a keyboard after the key has been struck and while it is being held down or sustained. Aftertouch is often routed to control vibrato, volume, and other parameters.