It's not just that it's an EU line, it's an EU line that is being specifically marketed as a separate toy line from the Saga line by Hasbro - one that is supposedly going to be running for quite a while.
If the SOTE line had been more than just 5 figures and a Swoop Bike, it might've warranted it's own separate standing as well, but it was a shortlived subset of the POTF2 line as it turned out, much like the other EU figures that followed later on.
The Star Tours line has actually appeared on POTJ cards for waves 1 & 2, and now the Saga cards for wave 3, so as such, their discussion is included in those respective forums where people would most expect to find them, regardless of the fact that they are technically EU. As you know, the POTJ Zutton is technically EU, being from the Holiday Special, but that doesn't mean that it would be worth the time to place it in a separate forum for it's inherent discussion though. It's on a POTJ card, so that's where it goes.
BUT, yes, there are definitely a couple of Clone Wars products that very much have crossover potential into the AOTC movie for collectors, including some of the Droid and Clonetrooper 3-packs. I've been contemplating moving that Clonetrooper 3-pack thread for quite a while, but have been letting it slide against my better judgement, due to it's crossover potential for collectors, but you're right - that one does belong in the Clone Wars forum, as that's the line that it's being issued in...
But it really just boils down to the fact that Clone Wars line is being (and will continue to be for some time) produced and marketed as a completely separate entity by Hasbro, with a corresponding multi-media venture to go along with it, by Lucasfilm and several of it's licensees. Sure it's EU, but it's an EU of a whole different beast...