Honestly, no. Big Show was the perfect guy for this angle, and it took me until last week to realize it.
1. As much as you want to use the slot to push a new guy, it would make little sense. Show, as a veteran, would definitely value his 15+ year job more than some blue chipper. They didn't have to do the "Big Show is broke" angle admittedly, but it otherwise connects, especially since they could use the ironclad contract against him. Plus, Cody and Bryan already got rubs from this angle, and the last thing you want to do is pollute a star-studded mega angle with too many rookies. Vets and Main Eventers should not be cast aside just for being older or in a good spot. THEY ARE YOUR BREAD AND BUTTER, USE THEM! Don't forsake your stars of today to try to make the stars of tomorrow, because otherwise you have no stars. Use up what little time the vets have left on the roster wisely.
2. The KO Punch is the best finisher to use for this angle, no matter how much I'm against the concept of superpowering Show's punch. It's already proven that taking out the Shield in succession with a quick finisher is epic. Besides, it'd look awkward if Steph commanded, say, Fandango, to legdrop their targets. The only other people who could have fit this role with their finishers are Sheamus and Mark Henry because both finishers take all of about half a second... but they're both injured.
3. Show is a better actor than most of the roster. The crying was annoying only because he was not giving a single damn a few months earlier, but to see him flip the switch from whimpering victim to conflicted antihero to pissed off giant to vengeful former employee is admirable in a pro wrestler (given some suck as actors other than their 1 dimensional on screen persona).
4. Show v. HHH is a vet combination that isn't too overdone over the years and can definitely be done. Besides, I don't trust HHH around any superstar who needs a bump from him, as it often doesn't work out too well. Give him a vet to work with and it not only draws, but works out well enough for all parties involved.