Less emphasis on Slavic culture and ties to the soviet union.
Czechia is Slavic and germanic.. Slovakia is more Slavic..
Unite the two and you win.
Problem is by the end of the cold war.. The Slovak peoples are quite differentiated. Czech peoples are also quite stubborn in who and what they are. So, easier way is to make Slovakia less I dependent Minded. Force economics.. Force czech Slovak unionism. Everyone literally stopped talking this after the cold War. Slovakia was always the other region. They need to unite.. So find a spark