I am not against NG+, but the game lets you max out your character in a single playthrough. Personally, I finish one character and then roll out another.
The level cap is 27 and you can easily get to it long before finishing the game - my current character is at the level cap and she hasn't even started the Wicked Eyes quest. And the best gear means the highest level schemas with appropriate materials.
I always gear up all my party members. Yes, it does mean some farming, but you end up with the best equipment and no amount of NG+ would change that.
I loathe farming and NG+ would most certainly change that. You'd have more money and you'd be able to purchase some of the high tier materials. You wouldn't need a lot of the materials that you do loot because most of your team would have decent armor from the first playthrough, so you could then use it to outfit them with higher tier armor, instead of wasting it early on when they need armor. Seriously, if you
have to farm in order to get the best gear, something is wrong in the design. Pfft, I did four playthroughs (really only three, as I had to restart because of a game breaking bug) and then had to farm to get a FT Silverite. It took four games + farming. So yeah, NG+ may not increase your chances of picking up better materials, but it would allow you to use what you do pick up more freely.
Also, NG+ could raise the level cap and if you wish to make a fresh character...well, then do so. The ability to choose NG+ isn't going to hinder you in any way.