Now that's a character I haven't seen in quite some time. My last view of him was in a classic JM DeMatteis/Mike Zeck/John Beatty arc in Captain America in the mid-1980s. The idea of a cybernetically-revived soldier sharing his brain with an artificially intelligent computer in a dystopian future was actually pretty fun to read.
Not that I know of. I still have most of the issues that I picked up back when they first came out during my teenage years. The Essential volumes have only gotten as far as the early 1970s, still way before even Jack Kirby's second go-round with Cap in the latter half of the decade. DeMatteis and Zeck were on board for a couple of years around 1983 or so, with one good long arc featuring Baron Zemo (before the Thunderbolts era) and the one with Deathloc.
It's possible that it got one of the Visionaries volumes. I saw no need to pick up anything more recent than what was covered in the Essential volumes due to the fact that most of those issues would've been too expensive for me to purchase from the back issue bins. By contrast, you can easily find more recent stuff in the dollar bins, even though you'd be looking at yellowed or damaged pages. I just like to read these comics, not sit on them like they were some sort of antique to trade or sell.
Most of the current stuff is geared towards a far different fan than myself, so I've not followed Cap in a while. I left when Zeck left, and it seemed to me that the stories started veering off into a territory that I was uncomfortable with (the whole "Red Skull had children" angle, USAgent, CapWolf, etc). The DeMatteis/Zeck era had a sort of logical progression to it that appealed to me.
The thing with the Essential TPBs is that they're reprinting the entire runs of the comics being covered in sequence. If they do follow up on Captain America, we might not see the second Kirby run until Volume 6 or 7. Then there'd be the Roger Stern/John Byrne run, followed shortly by DeMatteis/Zeck.