Long-term projects may be good because Roma will be able to have good performance in the future, but if in one or two season there is no improvement and all efforts are in vain then it is likely that De Rossi will lose his position as coach and Roma will get new coach and new plan too until finally Roma only focuses on all new plan that cannot produce any changes.
What is needed is not about plan in the long term but real proof in faster time considering the many team from each competition and if Roma only continues to lag behind then they will not be able to achieve the achievement of winning the title.
For now I admit that Roma has everything well from reliable players and also experienced coaches in Serie-A, they only need to develop all of this to be able to create competent and strong squad to be able to survive consistently in its best quality.
Yes, you're right, also as I was saying that these are hypotheses that I'm putting forward, no one really knows what the plan is. However, in my opinion, planning for the long term is better than planning for the short term, for a season.
You need to have a long vision that allows you to plan and take steps at the right times in order to optimize for the future
It doesn't seem right to say long-term for a manager, unless it's for young players then it would be right to say long-term plan. But when it comes to a head coach or a manager, the hope is for a quick success because so far the head coaches who have managed to stay with a team for a long time have done well.
There are many examples, for example like Diego Simeone at Atletico who managed to make Atletico always in the top four of La Liga and always enter the Champion League, Diego Simeone managed to make good results for the team from season to season so Atletico kept Diego Simeone. There are also other examples such as Pep Guardiola also at Manchester City who managed to make Manchester City dominate the Premier League. In essence,they really managed to make the team improve every season so it was worth it for them to be retained.
But about De Rossi? I think AS Roma should already be looking for a new manager, at least make preparations faster it will be better if later AS Roma continues to get bad results then AS Roma already has the right manager to replace De Rossi.