I enjoy Strangerville, and you can - to a certain extent - ignore the storyline if you're okay with sims behaving weirdly while you're in town. And in the Military Career, you'll want to visit because some of the work from home tasks require interacting with other military personnel, and the easiest place to find them is in Strangerville - specifically the 8 bells bar.
How replayable the storyline is depends on how easily you can spin it for different "takes" on why your sim cares to take it on. I've actually found more options for different takes once I played through a couple of times, since knowing the plot actually helps me come up with alternate reasons. But the tasks themselves will always be the same.
As a sometimes builder, I love the build mode items. I like making Victorian "Painted Lady" houses and only wish there were more color options.
So, yeah, I'd say to get strangerville, but at the same time, unless you enjoy that style of build and/or the idea of the storyline, I'd wait for a sale