Hi Drew,
Looking at the different subscriptions and limits, below is the difference between Marketing Pro (left) and Enterprise (right) when it comes to the Social Media tool. Pretty much, you will be able to link more accounts, the rest is the same.
I guess that if you were to elaborate on what “do more” means for you, that will help me potentially give you more ideas on how to achieve those things within Hubspot. 
Here to help,
Eli