Looks like SPERG might be alright:
E: 1.9 Trip report. It doesn't appear to break SPERG very much, at least skill-tree wise. The Legendary reset thing is, however, a bit wonky. Just as a quick test, I reset that tree, got all 9 perk points back that I invested in the tree, and consoled it back to 100 using advskill. The automatic perks filled out properly, although I still had the 9 perk points. So yeah, if you use the Legendary feature with SPERG, you'll be left with an abundance of perk points. Unless seorin can fix this, I don't recommend using the feature.