Obama's economics are considered fairly middle of the road by US standards, which neither Rs or Ds would consider right wing.
On the question of a Romney Presidency - taxes would've gone down, judges would've been more conservative, Russia would've been confronted more directly over Ukraine/Crimea, there would've been no movement from the old predatory health system to Obamacare (despite Romney's loose affiliation with a similar scheme in Mass), there would've likely been no Iran deal or pointless trip to hang out with Castro etc..
At the end of the day, Romney would've been a very liberal Republican President, but it would've still been some distance from where a pragmatic Dem President like Obama was on the political spectrum.
Yep and to add, Romney would have also looked to scrap Obamacare as that was (and still is) a GOP rallying cry, no matter how similar Romney's own MA model was. He would have gotten a lot of opposition from his own party if he stood in the way of getting rid of Obamacare and I don't think he would want to use a lot of political capital in that fight.