ph0rk
Friendship is Magic, and Magic is Heresy.
If we keep falling back on DM judgement, we don't need rules in the first place - the DM can just free-from everything by fiat.Isn't that what DM judgement is for??
I would not want to play in that system or game, unless the DM was cult-leader levels of charismatic, perhaps.
The entire point of a pre-packaged game system is so the DM does not have to adjudicate nearly everything in-game. The more the system shuffles that load on the DM the easier that system is to learn for the players (as they aren't really learning much) but the harder it is to run for the DMs and the even greater variability in play there will be from table to table. There will always be some, but 5e is so loose things like the availability of advantage in combat vary widely (as does the length of the adventuring day and frequency of rests). That coupled with DC creep for checks means you'd have to play most of a campaign with a particular DM to finally understand how the system actually works when they are running it.
That is not good system design. It is pretty far from it, I'd argue.