Personally I have taken time to watch Gitten play and I can say that he is a young talent with lots of prospects in the future and I think Chelsea have discovered a gem from Dortmund. He might not be scoring in large numbers now but the kid could develop to be something like Ousman Dembele in the future.
Gittens is a talented young player, I agree with that and Chelsea spending a lot of money on young players for the future is a very wise move and indeed Chelsea has implemented this in the last few seasons, they focus on building a team for the future by recruiting young players even though there are risks but so far I see Chelsea's steps have no obstacles and they can even be better.
Chelsea will be great again with this best decision they have took, it actually very risky which I agree with you and once again it will require time because investing in a young players is a good start and a good development, just that the result doesn't come as fast as we expected but when the time comes it's will actually look very great. No need to underage any player now because each and every player has his own specific time to explore. I respect the decision there took let me just say that Chelsea bought players more than any clubs in Premier league, they have to take the risk if they really want to be at the top and this is what others few clubs need to explore but finance is dragging them down.