The performing of 1st gen mutants with 1500 fitness and 1% shooting , was definitely a glitch.

My main question is if the performing (5* q, playing as a higher q) of the 2nd gen "mutants", with 340% +1% grey skills, is a glitch or not.

If it's a glitch, then nord-devs did right with this update (let's leave out the communication thing, where they first made the implement and then worn the managers - this was wrong at any point of view).
That means the training system has a "hole" and the devs must fix it (or start working for a new developing system) and explain to managers how it works.

If it's not a glitch but it's a result of "good" and "smart" training, then it was wrong their action and they should prevent only the matter of up-selling and creating 18 y.o. players with those skills.

Also they should explain what is the role of "white" skills in game mechanics and with what logic a ST can perform so good with 1% fitness (or a DC with 1% Speed vs a normal 140% Speed of oppo attackers).