I'm not convinced it's going to be received well even after players actually try it, having the jars just disappear and not be able to be used to fill up is the kind of thing that will just pull players out of the experience. Every time they go to drink it's just going to be like "Oh here's that thing the developers are making me do" rather than just being immersed in the survival aspect.
As someone else mentioned, you already don't see leftover containers from various other things like gas and acid. It is one of those things that if it never existed, no one would even have thought about it not being immersive. You certainly don't see a bunch of people complaining that they don't have leftover gas cans and acid bottles whenever they use those. Why not? It is just as immersion breaking. The reason is because it's simply not something you think about unless you've been getting the leftover jars and no longer get them. For new players who never had glass jars, they aren't going to care or even think about the fact that they are missing. The same for the cans going away.
I am not sure this change for water is really going to make any difference whatsoever. I mean, I only very rarely after the first game or two actually use an empty glass jar for anything. They just pile up in storage. So removing the jars isn't going to have any real impact on my water. The change that may impact my water is the change to the loot tables. Granted, if they left jars and changed the loot tables, it would just mean people will craft or use empty jars more often, defeating the loot table changes. So it makes sense in that regard. But we will have to see what the loot actually looks like for players who do a lot of scavenging and questing. It may not matter much at all. I may even find that making dew collectors isn't worth the time and resources. After all, once I can make mineral water, I never drink anything else anyhow and then dew collectors would mostly be useless except if I need water for making food and can't find enough in loot. I have never made glue as I always find more than enough for my uses (I don't make arrows, which is a main use of it). Of course, with having to do tons of repairs to vehicles in A21, I might need to start making some. Though I think there's a good chance I'll mod out the vehicle damage change unless it can be adjusted in settings because losing 10-20% durability in one crash is going to quickly become annoying. 5% or less I can live with, but not more.
All in all, I think it's a convoluted way of trying to make water difficult and even in the devs' view it is only going to matter for the first few days before it is once again meaningless, so what's the point? There are far easier ways to change water scarcity without making a large dew collector farm, but we'll see how it works. I honestly don't think I'll even notice it after an hour or two of playing. Which makes me think it was just a waste of dev time to implement something that will have so little real impact. But we will just have to see.
I'm just trying to see if there are any other alternatives, but if the dew collector could possibly fill up with water when it rained then I'll change my mind and say that this glass jar change is alright and that I'm all for it (when the weather gets fixed because it's on the roadmap to gold and beyond). And it doesn't seem to rain as much as what it should.
Unfortunately, rain isn't an option for a few reasons. One, chunks that aren't loaded can't have rain so if you're not close to your base, it would never fill up. And two, the game doesn't actually track rain anywhere other than whether or not you as a player is wet, so it isn't currently an option. Doesn't mean they can't do something to get it to work, but they chose dew collectors as a workaround for that.