I recently climbed the Split Pillar for the first time (and the Grand for that matter) and the climb is at my limit. The approach to the Pillar is nothing to worry about. The bolts are in the right places and the gear is reasonable. The thing with the Pillar is that the climbing is easy but there happens to be a lot of it. It is more endurance than anything. If you have good endurance it's 5.9, if not well...
I have terrible endurance so I took the chimney option to the anchor since I could no longer close my hands at that point. I found it to be a tight squeeze at 5'8" 155 lbs. Just thought I'd add the weakling wimp point of view. Oh yeah, you can sew it up with 2-#3's and a #4 but the extra weight may defeat you in the end. The falls are clean as you can see from the beautiful picture above.