While I do think spoiler tags for anything in an episode less than a week old is probably just good manners, I have no intention of putting in place any sort of official policy requiring them. Rules are for Cardassians, and here on Risa we have little pictograms on our foreheads, not spoons.
In my opinion, anyone seeing a spoiler tag should assume it's for something recent. Nobody is going to use the tag for a 23 year old episode of VOY.
I enjoyed this issue quite a bit, as we finally get a bit of actual story momentum, especially between Worf and Alexander. Sisco being side lined for the issue so we can get the big final confrontation between him and Kahless in the last issue of the crossover didn't work that well though, and I feel like we're supposed to care more about captain Meyerson, despite the fact that he's been in like two issues, one of which being the FCBD issue which was barely marketed.
Still, on the whole, between the Worf/Alexander fight, and the Defiant and Theseus crews working together across the two ships, this mostly worked for me.