On BBC Fivelive they were suggesting Solskjaer has ALREADY improved Rashford's finishing. Which is frankly hilarious and stupid, but #narrative of course.
It is not outside of the realms of possibility that Solskjaer could have imparted some personal insight on the art of finishing that has helped Rashford in some small way already - Rashford is only twenty one and hasn't exactly worked under the best and brightest attacking coaches in football over the last few seasons during his breakthrough into the first team.
The general consensus on Mourinho's coaching methods is that he drills the defence and tells the attackers to do what they want when actually attacking - this wasn't hard to believe when watching how clueless we looked when attempting to build an attack during his tenure.
Solskjaer isn't a miracle worker but he is an ex-striker (at the highest level) and a coach that seems much more hands-on when it comes to the attacking side of the game. Rashford, Martial and others will be learning things all the time.
Not Lukaku, though - he's beyond help.