Loads of teams have started doing this now, it's not about his kicking, it's just a way of evading the pressure teams are putting on short goal kicks.
No one with a good keeper is doing this, and given it completely undermines the entire reason for Pep having his keeper playing with his feet, I would be amazed if he is doing it in 6 months time.
It screamed “don’t make him uncomfortable on debut” to me, and I expect they’ll be getting him up to speed with his feet from here on, but time will tell, if Dias is taking goal kicks in April I’ll be amazed.