Devs have said they are working on improving the explosions, with building explosions somewhat taking after solar panels blowing up in TA. From that I'd guess we'll get bits of the buildings and its debris blowing out. Really looking forward to their take on it as spinning debris in TA looked very cool.

I don't know if improved explosions for units will come at the same time. I kind of expect them when they start allowing for unit metal reclamation (instead of dissolving). 

Either way, improvements are being worked on so, something to look forward to.

Is there a new roadmap published somewhere?

Or are you just commenting based on snippets elsewhere?

This is one of my biggest pet peeves at the moment. I thought it was a graphics bug at first myself until I watched the official gameplay video. The weapon fire streaming from the units themselves looks amazing, but the hit effects and subsequent explosions are completely the opposite sometimes. It really stands out because of this.

I understand there is a balance for game performance and battlefield readability, but there is definitely alot of room for improvement here.

Frigate explosions would be an easy one to improve. At the moment they make a poomf smoke ring and the unit itself just dissolves very obviously in the middle with a shader effect. There should be a small accompanying explosion to help make the unit's destruction abit more obvious to the player that would help disguise the death effect.

Cruisers are much the same. They appear to have a few more effects used than frigates but again the same thing applies, they need a few more explosions added to help disguise the death transition effect.

Buildings also could use more explosions, they have mostly smoke effects at the moment and the model disappears very obviously once its destroyed which takes away from the quality of the game.