You may hate him, but I have learned to love the pilot upon which sits the mightiest mustache in the Star Wars galaxy.
He has quite a few viable astro options, but currently R4 just wins the war due to efficiency and occasional clutch damage reduction.
Could R3 be poised to change that?
The way rebel lists are going, we will soon be seeing lots of focus gifting with jyn and lots of big boomsticks with Ordnance, Miranda, Ghost and Nora. Biggs' damage contribution was always secondary, and his focus normally gets swallowed up in defense anyway, so R3 spawning an evade for him, on top of focus stacking, could move Biggs over into new territory. Currently, it's a big deal if he manages to limp over the line into the second round of firing - that might be something that becomes more reliably achieved.
When Heroes arrives, we may see a few Jan/Jyn R3 big(gs) hitter lists, which will leave Biggs sitting pretty on 2+ focus and evades - what are your thoughts? Biggs only has 1 more point invested in him, but suddenly he's a monster to put down, and when he fails, the support team backs the list's main big gun (eg Nora).
With a Jan/Jyn Uwing backing him, Biggs might even want to take R2-F2... Imagine a 3-agility Biggs sitting on two evades and three focus...