Out of curiosity, I went to the Japanese pvp forums the other day and from what Google translate could tell me, I was relieved to see that they seem to completely dislike the new Shatter too, some of them even compared it to a FATE, and I couldn't agree more.
It was always the less popular FL mode because of the heavy PVE element to it, but now it's gotten to asburd proportions.
The big ice right of everyone's spawn is pretty much always a no go unless you have a team that can clean up entire crews and knows how to press their buttons, leaving the two other teams to mostly chase small ices around the map and avoid each other as much as possible.
If this mode is to keep going I think the best solution would simply to have 6 ice spawns in a circular arena (2 ice spawns in front of each GC base, and maybe a 7th in the very center of the arena. It would incentivize actual pvp as there wouldn't be far away spawns that completely disrupt the possibility of brawls.

With how the map is built right now I'm not sure how they could achieve a balance between ice breaking and pvp by simply lowering the ice repop timer. Most of the players that play FL now are so casual that they would just hide during the downtime.