http://wiki.teamliquid.net/starcraft/Main_Page
The game has aged beautifully, thanks to great continuous patching by Blizz, keeping the game running on modern OS's without finicky behaviour. This 4K remaster in my opinion is purely icing on the BW cake rather than a burning desire of the community. From a business perspective, I think Blizzard is hoping the BW eSports scene can become more international , vibrant, and bring in some active revenue for being a much-loved game.
if it's any consolation your interest died with the game. :(
still one of the greatest games of all time. just always had a hard time finding traction in the west where players and fans seem to prefer games like Dota/CS. i'm not sure why exactly.
I've uploaded my old custom map folder left dormant for years, that includes all the maps you mention. Tower defense, glitch maps (I hope the old glitches will still work!), and dragon ball Z maps. Here: https://mega.nz/#!yE9jTZYS!EegEFOhl0uycGxChVwwlJS-zrAXcAGBmC...
So I guess it will be always online, no lan, Blizzard blessed servers only just like sc2...
For a few years I followed SC2's e-sports scene, but my interest slowly died out. With this new release, just imagining all the possibilities is getting me really hyped. I'm gonna call it now and say that it's a given that we'll get a few tournaments with all the big StarCraft names.
And it'll be a blast to re-play a bunch of those older UMS (Use Map Settings) games. I remember spending countless hours playing custom games. It was my first introduction to tower defense games, stacking hundreds of cannons and hoping you'd make it past one more level. And the countless challenge survival maps which required you to pull off exploits and glitches to reach the next part. Probably a bit silly, but one of the maps I remember best is Dragon Ball Z RPG. Even if they don't quite stand the test of time, getting to replay them just for nostalgia will be fun.