What was driving fighters to higher and higher attack values before Battlegrounds came out?
And what if a new feature gets released next year that significantly favors strong fighters and you haven't been working to increase your attack?
Originally GvG - where higher boost was a driver not just to win the fights but to reduce the troop loss and increase the amount of fights one can sustain in the long term.
For a long time though, nothing important. Many players have long passed the point where further attack boost was saving them anything meaningful in GvG (that is their GvG capacity is limited by time they want to spend in it, not their city). It's actually why I quit for a time this past summer - it didn't feel like I was accomplishing anything meaningful with my city. Sure I can get more attack boost, I like attack boost. I can get more FP and level more buildings. But what did that attack boost do for me? What did I need those higher buildings for? Not a thing. I had often even lost the will to go through collecting my daily FP. I'd be logged in looking at my city and go ugh, screw this. I hadn't noticed the difference in what I do for a very long time and had lost my motivation to even try. When I came back to setup for GBG I had like 4 events worth of grand prizes unbuilt in inventory I found because I just hadn't cared to get them built.
As for 'what if a new feature gets released in the new year?' This IS the new feature. How long as it been since GE4 was released? 2.5 years ago. That was the last time there was a new reason to get stronger before this. And since that was a fixed number of fights a week, and the ability was there to bypass the hardest ones with goods there wasn't a lot of pressure on that one. It is highly unlikely we'll see anything new and more demanding after this for at least 2 more years and getting ready for a feature that may never come is not my idea of a good time.
There are people that just enjoy seeing their numbers go higher. Personally though I only enjoy seeing myself overcome challenges I previously could not. This requires two things: 1) something I can't currently do; 2) a reasonable path to get past that limitation. In absence of that, this game may as well be dead to me.
GBG has the potential to provide this for me - but it was hard enough to imagine a fighting path under the old balance (I had joked about deleting my traz for space on my mars world because negotiation seemed so obviously better) and I was relishing that fighting did seem an interesting (albeit probably still not ideal) alternative on my CE world to have a different experience. Under the changes on beta, it would no longer be an interesting alternative and I should chase sleigh builders in winter event and then move to TE to be setup to negotiate on 3/3 worlds I'm actively trying GBG on.