- All guilds with level 10+ become level 5 and get guild points.
- All guilds with level 9 or lower become level 0 and get guild points and a guild bonus as a compensation.
My French still isn't that good and it may be that I understood something wrong, so here's the original answer from the french CCM:
This is pure silliness if its true, my main guild has reached lvl 20 and it gets the same rank as a lvl 10 guild which i made for my alts and lvled solo. I hope there's a difference after the update '
Example (point numbers will be wrong)
A current lvl 10 guild becomes lvl 5 and gets no guild points
A current lvl 15 guild becomes lvl 5 and gets 5000 guild points
A current lvl 20 guild becomes lvl 5 and gets 10000 guild points.