You don't have to justify your purchase to me, but you said it yourself you want a guitar that is "enjoyable and easy to play" and you've bought a guitar you immediately feel the need to modify (middle pickup, blocking trem) to meet those requirements, perhaps it was the wrong guitar but if you like it sure. A Strat isn't really the same thing, the bridge sits flat on the body and turning it unto a hardtail is as simple as adding a spring, it doesn't have the tuning stability of a locking trem so it's less attractive to use and you're not paying a premium for a vintage Strat trem like you do with an Edge.
The Tremol-no is a great system but it's not compatible with the Edge Zero, I don't know if there are other systems out there compatible but there are many in depth guides to blocking a floating trem on the internet and they all follow the same concept.
I suggested a solution to your problem, you don't have to take the advice. The issue you have with pushing the trem sharp is common with players who are new to floating bridges, especially the Floyd Rose/Edge variety. Typically that issue disappears with time, very quickly if the player makes an effort. The trem itself opens up a huge new world of expression on the guitar, and you've paid for it so why not make the most of it?
I can't read minds and guess that someone who has taken the time to join Jemsite is also a casual non-committed player who has no time to practice and who doesn't care about good technique. You're on Jemsite, a site dedicated to Jem and Ibanez enthusiasts, many who are pro musicians or very enthusiastic hobbyists, but almost everyone has a day job and everyone has time constraints, I don't think having limited time to play is a good reason to short change yourself on what is actually quite an easy problem to eliminate with your technique.
You don't need to be Steve Vai to palm mute on an Edge without pushing it sharp, fixing the technique will also likely cure your issue with hitting the middle pickup because you will move slightly forward (just ahead of it, in the direction towards the neck) with your neutral picking position.