So, here my current thoughts.
Aside from some cosmetics (like some sparks when colliding with walls to visualize something happened/damage was dealt) I'd like to have more depth to "tools" available to the bots in battle. Obviously it's difficult to not compare berrybots with robocode, so hopefully people can forgive me for that

. I never really played robocode though, so I might misunderstand some things.
As of there are no defensive tools in berrybots aside from dodging. Robocode has "bullet shielding" (one can destroy enemy bullets with their bullets). I'd like to either include that, most likely in form of a new weapon in addition to laser and torpedos, or some form of "shield". The shield could partly or fully shield from some or all damage, could restrict firing weapons while on, could use some sort of resource (I would say energy, but that's what berrybots' health is named, but maybe even the health?), could slowly replenish over time, could be directional only, etc...
Other than that I don't like that there is not much drawback for firing lasers. They don't cost any resource (robocode bullets cost health, but I don't really like that, especially that you get health back when actually hitting the enemy), so you fire basically always when the laser gun is ready. Especially considering all lasers have the same speed and deal the same damage. So there is no choice regarding not firing (unless I would hit myself) or how strong.
Torpedos don't seem to be strong enough to be significant in strategies. I think every bot who registers a fired enemy torpedo should kind of think "oh shit, now I really have to dodge/defend properly". So I would probably increase damage, but limit number of torpedos each bot has (maybe 5 or 10), so firing them should not be done too willy-nilly either.
It's kind of difficult to judge how those different ideas would play out in the end, i.e. how they would affect game play in the long run. I don't know how a good work flow would look like, but it's a lot of work just to implement those ideas just to check them out... So I would appreciate any thoughts on this

. Otherwise I guess I just make a decision by myself.
Cheers