Line training in any airline is there to equip one with the basics so that they can operate safely but finesse and overall polish is not what line training is designed to create. These qualities mature with time and mainly due to two reasons. Firstly improvement though greater experience thanks to self learning and learning from mistakes and secondly and most importantly, by observing colleagues and seeing how they operate.
Whilst we are bound by a myriad of company procedures and rules, we all add our own personal touch to the operation. These personal touches often enable us to go above and beyond what is expected to make us compliant with the various policies and rules. It's this that creates the finesse and attention to detail and this evolves over time and not overnight.
Once equipped with the basics and released to the line from training, then any new F/O in any company will then spend nearly all their time flying with line captains. So guess what the main source of knowledge and guidance will be to allow your new F/O to improve?
I would hazard a guess that the new turboprop pilots coming here to EK are aware that it's a big step and are hungry for advice and knowledge, since they are grateful for the chance of going straight onto a widebody jet, despite all the ills that the company faces. That is for a separate thread! The experience spectrum of pilots joining from turboprops is varied with some holding TRE positions previously and have amassed more than a few hours over the years. Dismissing them as 'boy wonders' is unfair to your new colleagues. If you see something that could be done better on a flight, buy them a beer downroute and share your knowledge and chat about it. They could very well repay you with more than a few beers if you ever fly together again.