I recently got a Morningstar MC8 and it’s great, agreed! So easy to set up, super robust construction. One gotcha is that for notes, the default velocity in the Morningstar editor is 0, which OT (correctly) interprets as a “note off”, so remember to change that when programming. Took me a while to figure out why OT wasn’t responding…
The lag you mentioned is intentional so that double-footswitch shortcuts work, otherwise it would immediately interpret it as a single footswitch press before your foot has a chance to press down the other switch. This can be dealt with either by adjusting footswitch sensitivity or setting “looper mode”, check the manual for details.