Pro is definitely easier to setup and takes much less effort to tweak but, premium is still the better, more satisfying playing game.
Sadly it takes more tinkering than two Avengers LE/Prem put together to get "just right" but, the extra features are worth upgrading to.
Neo has given excellent pointers to help the targets (bend forward, add/replace foam) and the lanes (tap up) without the need of sneeze guard plastics, OR drilling your PF.

The right ramp can be tamed as well by adjusting the entrance slightly, removing the 2" hex spacer in lieu of a 1-5/8", and slightly manipulating the angle (bank) to where the wireform begins to give players a smoother, sweeter feeling return/shot.

I haven't tried raising the tip of the flippers to above the dot just yet but, I could see it making shots feel more natural.
Getting rid of that black Happ rubber livens things up too.

I also lowered the coil voltage, scoop kickouts/trough eject, and added a green shooter spring which helps tame things even further.

Game is set up at 7 degrees.

To add to Neo's supposed "bad advice", I found that the smaller center rails are just as guilty as the outer rails in launching the ball skyward. Checked the height of them compared to my Wolvie and sure enough, they also sit lower.
(Frankmac, probably doesn't want to hear what I did next...)

Surprisingly the drill managed to stay in the toolbox, where it belonged...
I did however equip a refreshing screwdriver once completed.

Day eight of GBP play testing/tweaking continues.
Maybe one day this game can finally consider itself "Dialed In."