It gets boring real quick. It's just... why make a game this way?
Like this, let's say someone made a game called Chess Online. Alright! Chess! Online! Awsome!
But then when you play it you realize that chess pieces doesn't really move the way that you are used to, some moves have simply not been implemented into the game.
And for some reason the matches all take place on a 6x6 board. Well, hmmm, ok, maybe this is an interesting new way of playing chess. At least you can upgrade your pieces with new moves and hats. Hats are really important in modern games, that is a factor noone should overlook.
If you pay enough money you might actually be able to upgrade your pieces enough to take on the computer controlled pieces, in the campaign you need to pay for to get access to.
All in all, it looks like chess, at least the pieces do, but the board and how the pieces move, well, it's not chess.
And 'Jagged Alliance Online' has nothing to do with 'Jagged Alliance', no more than checkers has to do with chess. Over simplified and poorly implemented.