There's little I can say that other's haven't mentioned. I will say from the DM perspective (I don't play, I exclusively DM) is that the monsters can be oversimplified, but the simplicity of the 5e rules themselves make it very, very easy to modify monsters, even on the fly. Furthermore, there are third party source books like Tome of Beasts, Creature Codex and Expanded Monster Manual that make 5e enemies much more difficult and varied (EMM is one of the best thing i've ever bought for 5e; it takes every core book monster and adds a handful of variants).
Another plus of playing 5e this late in the game is that any and all faults and weaknesses have been viciously addressed by the fan community, and you can find an answer to anything online.
Another bonus is that the adventure paths are mostly quite good, especially if you start with Lost Mine of Phandelver, one of the great D&D adventures of all time, in any edition. You will find maps for everything, walkthroughs, enhancements, handouts, and complete Reddit breakdowns of every official 5e D&D module, and advice on which ones you would like and which ones to pass on.