No one has any real facts about how his training will change or how young riders are developing on RB vs. how they would have developed elsewhere. We can say for sure that Roglic came over from JV and his form took a little dip in early 2024 as he figured it out, but then he looked great winning the Vuelta for RB. And we can say that Lipowitz for sure has developed very well, about as well as you could possible expect him to have developed.
What I think will help Remco the most is having the confidence that a big team can bring. Maybe the training will be better, maybe he will get better support on tough days, maybe they can help him with technical descents, maybe he can learn from Roglic the sacrifices necessary to keep weight down and win stage races year round - tough to say. But I think with Remco confidence and the resultant grit to dig deep because he knows he has it in him is 80% of the battle. The other 20% probably being his weight. He will also have other riders like Roglic and Lipowitz to bring a sense of stability and reduce the pressure (although an argument could be made that it increases the pressure).