I have no idea if it's possible, or easy, but I think I'd like to see an increase to the size of the TML yellow dot (only for the high damage ones, ACU tactical missile and the structure launched one). I suggest this because I think that, by this game's own standards, there is a mismatch between the threat it poses and the way the threat is presented to the players.
If the launch and explosion use distinct sound effects, I also wouldn't mind those sounds be made louder or somehow distinct from lesser missiles. It would help a lot to alert otherwise distracted players that measures might need to be taken (same way a the sound of strat bomb's release serves brilliantly to draw players' attention right now) and reward scouting (or punish ill-chosen times to strike), since the launch is only audible to players that have vision of it.
I'd also like it if the billy missile showed the bigger yellow circle to opponents as well, the same way it's presented to the player that launches it. I think this change would make dodging it more feasible, and that's the right kind of interactive gameplay to nurture. Picking out the billy projectile is too tedious with a hale of T3 mmls also firing everywhere, and as a consequence, dealing with a billy is a bit too taxing on focus and micro, since the minimap or UI doesn't clearly communicate the occasionally greatly increased threat. It's now partly a struggle not with the opponent, but with the interface, which makes failing at it feel more like falling prey to bad pathfinding, for example, than being outplayed.
Such a change would lower the skill floor at which billy works as I think is currently intended without upsetting the balance too much, in my opinion. I'm not suggesting this because I think the billy is too strong, just think this change could emphasize an interesting dynamic that is sometimes not in play currently because of UI clutter. That being said, I'm no expert on balance, and if a bigger visual indicator and louder swoosh decrease billy's effectiveness, I wouldn't mind any buffs the balance team think are appropriate to it as compensation.
What does everyone else think?
Edit: mentioned sounds as well.