For me it boils down to two, well actually three things, basically already touched upon...
-It's tooling wasted IMO. Better versions exist ultimately, and Hasbro's always saying expenses expenses expenses have driven the line to higher costs, then they make these, which cost something, and took away from other aspects of the line... Clone Wars is just one example. Line's costs are spread out amongst everything, so even when something isn't directly targeted at us, its cost is at least tied to the things we do have targeted to us and I do feel it detracts from the line as a whole then. Hell, more durable, but inferior, versions of these figures already existed. Why waste the money?
You can certainly vote with your dollars by not buying, but that doesn't detract from the fact those took away from something else. It's not like the 30th Pilot Obi-Wan that was gravey, and actually added some value to the line to be spread out elsewhere.
-Again, the slippery slope argument... I think it's valid. Hasbro looks for ways to cut corners all the time, and this is a prime example of them trying that out, without dropping the price, which I could easily see something very similar happen with the regular line... Which when you think about it, it already has with Movie Heroes figures being similar to the figures in these battlepacks (the new ones anyway). I'm not opposed to compromise, I just see Hasbro viewing compromise as "taking liberties with collectors will be ok because they're not as important overall".
I don't view 5 points as the future of the line, but I've seen features steadily cut in the line while the price has steadily risen. Paint aps are down, but prices are up. Things are molded to the figure now that once were almost always a separate sculpt. Headgear is going back to being non-removable on many figures. Accessories are arguably a different now than they used to be too. Two packs are basically gone. Running Variants are gone more or less as well... all while prices went up.
-Battlepacks had just gone late last year from 4 figures to 3, but with a promised price drop. Then as soon as the new year rolled around, new prices for Battlepacks followed that were up again. Now the figures themselves are of an ultimately inferior quality (they certainly cost less, at least, not arguing aesthetic value), plus the price is still up so there wasn't any real compromise there at all.
I have zero intent on buying these, as I noted, so that's not an issue. Everything else wrong about them is though, and in my view it's quite a lot and impacts other aspects of collecting.