The "vanilla" experience, every season, was good for about 1 or 2 months, then it was just boring every other month.
We needed something to rival against servers like hypixel and skyblocky (F1NN5TER'S skyblock).
Skyblock as a whole has changed, and vanilla skyblock just won't cut it anymore if a server wants to be successful, it needs a USP (unique selling point), something to make it stand out from the crowd.
I'm looking forward to seeing how the server evolves with custom content, and carving out it's own niche.
TL;DR
Invaded needed something to stand out, has delivered, am happy.