On the larger keys like in the worst case the spacebar this sucks especially, since the risk of them getting damaged is bigger.
My solution was wiggling the keycap slightly instead of pulling straight up. Like tilting it from left to right. Only slightly though and with patience, you don't wanna break of the stem.
On the ones that were stuck very badly I put two cocktail sticks as little leavers beneath the cap's bottom and the top housing of the slider. This always worked out for me
I've heard rather mixed reviews about Matias' switches lately, but more about keychattering and so on. Ripping the entire switch unit right off the board sounds insane

Sorry if this isn't helpful.