If I remember correctly, they want to redo the old area after the entrance once the hotel and new main entrance is opened.
This will cost time and money, so this is likely to be a multi year project, but might also come with some new additions (but also some removals).
In addition we need to keep in mind that the tilt coaster is likely to be the last project with EU funding. The funding was reduced from project to project, and if I recall correctly, the tilt is only 10% EU money.
The huge amount of rides also costs a ton of money to maintain. Whilst EL is profitable (yes, they really are), they still need to have a look at their costs.
But still, with them aiming to score foreign visitors and not just locals, they will still add an „occasional“ big ride. Maybe more Intamins, instead of Vekoma?