Yes, winning D1 is an advantage
- you'll earn extra money in BBB next season
- you'll have better fan survey next season ("I am pleased with the team's performance last season") which also means more money
- you win most of your games so you even earn more money in the actual season
Winning D1 means that you are the storngest team in your country and I don't think that the strongest team needs to be strengthen even more (beside the advantages mentioned).
Don't feed the troll