In your opinion, I feel I would make good use it with the larger screen. Still, it voids warranty and loses one key feature.
Of course - that goes without saying, but have you actually tried using it productively? It's pretty infuriating to use tbh.
We have two Note 3's in our household and I think the form factor is excellent, the screen is awesome and a decent size. They have a stupid bug in them though where one of the (samsung provided) services drains the battery, so you have to keep an eye out on that and if you notice it doing it (before it's sucked the life out of it) then you can switch the phone off and on to fix it. It's a known issue that samsung have never bothered resolving.