the problem with being disappointed with rereleases is that new releases are VERY expensive and time consuming to develop. they're already cranking out a LOT of new releases, some of which are VERY ambitious (though i'm still waiting for my Ilya Mouromets). if you weigh the costs of development, it's highly unlikely repops mean they're releasing FEWER new kits.
repops are useful. addressing Przemol's question they almost certainly are repops rather than stashed sprues, renting additional warehouse space to create a false scarcity can get expensive.
they do a couple of things. for modellers, those late to the party can get in on it, and those who get an idea for a project after a kit's sold out can scratch that itch. for WNW (or any manufacturer) the threat of selling out makes buying that kit more urgent, but repops mean you can sell more (and thus fund the elaborate new development projects like the Bloody Paralyzer and Lancaster).
they've also said all along (i wasn't there at the beginning but i read old interviews) that they'd reissue things but not in the same form, so don't expect to see the same scheme again. from everything i've seen the only real deviation from their original vision is the Lancaster, and that one makes sense given Sir PJ's dambusters obsession.
if a repop sells well it's likely to be highly profitable (especially compared to the initial run which had to pay off it's development costs). it's highly likely given that WNW is for the most part a passion project, that money gets reinvested in developing new stuff. i expect repops mean more R&D budget, and thus are great news for modellers who don't care about the repop and are hoping for truly new releases, too.
as an added bonus, every repop is a kick in the delicate bits for ebay speculators asking extortionate prices.
roll on reboxings!