Reality is McGregor already has good movement skills, good flexibility and a very good fight flow...
Considering this "playing touchbutt in the park" won't pay dividends for him ( to the opposite of some very stiff, unflexible fighter i.e.)
Using this time to work on his grappling/BJJ on the other hand...
By the way, another bad side effect of their association is that Portal seems to be an utimate yes man, which contributed boosting Conor's ego to skyhigh levels and believe his own hype way too much...