If they are, they can do the customisation, and if they are not, they are probably not interested anyway. I think WotC did the right choice of leaving the DMG light in terms of options, I would even have removed a few more of them, but considering the sales of 5e, it's hard to criticise...
It's not light, it's full of a ton of useless advice. It would be nice to have some advice I could use apart from the magic item list.
It tailored for beginners, mostly, with simple advice and simple options.
And simple advice for adjusting available equipment for different settings would be very helpful for beginners.
And my point is that no, it would not, obviously. Once more, simple game, simple weapon rules, who cares apart from a very few people ? After that, when WotC publishes settings, they can have their own tables there, but once more the lack of it just goes to prove that few people care.
Tech level is a simple rule that can enable a world builder to quickly and easily adjust the feel of their world.
And D&D is a medieval-level (even renaissance is an option, and one that barely fits properly) roleplaying game, always has been. It has no intention to fit other tech levels, most of these attempts have been really poor at modelling it and have had really little success. Again, very few people care.
No. That is what it USED to be. Now it's a generic fantasy toolkit.
