To be fair, I think this was kind of the point with the "relatively small" kickstarter though. I think it was likely understood that they wouldn't be getting as many massive pledges as some of the other kickstarters, etc.
For me, its a bit of a quandry. I'm a really new DF'er (backed KS5, timing was wrong for KS6). I don't have any caverns yet and still have Dungeon stuff I want. As such, making a big pledge for Hellscape doesn't make a ton of sense since as most have said, Hellscape isn't something that is going to come up a lot in most games (though I could think of a campaign where it might happen more often). So I may end up pledging for a few add-ons to give a bit of cavern terrain with some lava feel to it, etc. The door pack looks perfect (especially since I assume the actual doors would be compatible with the KS5 doors).
All that said, I think that the overall offerings so far are fantastic! Its gorgeous and I love that they keep pushing the capabilities of their products by adding things like the light pads. Those would work well with say the Eldritch Pools from KS5 for instance. I can't imagine ever needed 7 of the light pads though since I use this stuff for games and frankly, my players just are not going to get through all of that in one session. For those that do though, or who like to use it for display . . . yeah, absolutely gorgeous.
Now back to debating between making a higher pledge and picking up more stuff at the store. lol