On the note of +16 being 'hard' to get is a null.
The game circulates around the 'standard' and breaking the 'standard' is what makes you 'OP'.
The 'standard' in the game is, and always has been, the highest + bonus available combined with gear that is 1 tier higher than the base tier.
If you don't meet 'standard' you will have an exemplary time completing the instance. And the 'standard' for the highest level instances will always require this until the next cap is introduced.
To do TT when the cap was 50, you NEEDED +6 Tier 3 gear.
To do HoDL when the cap was 55, you NEEDED +12 Tier 4 gear.
To do RT when the cap was 60, you NEEDED +12 Tier 5 gear. (But, because of scouts, obviously, that requirement was easily overdone)
To go past this, the only way to play the game efficiently is to have plussed and tiered gear. Unless, you have some sort of 'game breaking' class in effect.
Being F2P does not mean you can do all the content. But, it's also come to the point where even if you're P2P you still can't do all the content. And it's ever more increasing in the gap of how much you have to spend to be 'bleeding edge'.
The whole arguement on plussing jewels is centered around 'fail rate'. Whether or not you decree it to be 'venting' or not it is an issue. And if something is continuously 'vented' about then it is obvious there is a problem. I haven't seen people complain about something so much since scouts chpt3.
Eventually, whether you like it or not, when people see continuing reasons to dislike something, regardless of how much they enjoy it as a whole, they will leave. While this may not be the last straw, it's one of them. And eventually there will be so many straws everyone will say 'vulgar word here' IT!
The game has a lot of fantastic aspects, this is not one of them. The players support the game. The game is getting heavy. It needs to lose some weight or start pulling it's own.