I watch him a lot and follow Charlton a decent amount.
Very good potential, but is only 20 years old. Since players at his position do not really get into their prime until at least age 24, he still has quite a ways to go.
This signing would not help the first team in ANY way, at the moment. CAFC are 6th in League One... and Konsa is not a full time starter there, so no way he would be on the field much here. Another Lookman-styled signing.
It's the kind of signing Wenger would make. Claiming it is a value (which it is) but has zero effect in helping the team NOW. Or even next year.