I don't even think they need preorders or anything, they just need to be a little more realistic about demand.
Very few people are going to buy every game. That's far-out mega collector territory, so don't assume that'll ever happen.
I have nothing against Stealth Inc, but they simply overestimated demand for it. Compared to their other releases, I'm not sure why they overestimated it (seems obvious to me that it would be one of their lowest demanded releases), but hey, just learn from it next time.
Likewise Oddworld was handled weirdly with not only being underestimated in terms of demand, but stock being split between the triple pack and PSX. Again, it seems pretty clear to me that Oddworld would have had more demand than Stealth Inc, but again, just learn from it.
Polls are a decent idea I suppose, but I don't even think it's necessary compared to keeping track of interest in individual games via twitter, their own site, etc, and making some assumptions based on the popularity of the game's original release. We're not looking at 1000 vs 100,000 copies here, we're talking factors of a few thousand or so. I think this is doable, and telling fans that more people need to support all releases is pretty unrealistic and unfair. I love LRG yet I've only purchased two games (would have been 3 if I got to New & Tasty before it sold out) and have no interest in purchasing anywhere close to all of the titles.