I love Haemonculus Covens, love love love, when they introduced this concept in greater depth a few editions ago it was just so much fresh air into our army, so I have a lot to say. Keep in mind I don't have any idea what I'm talking about.
I like the list, I was scratching my head trying to figure out how to turn this into a detachment that awards CP but I think that'd be way too much of an overhaul for just one CP, but the easiest way would be to get some Mandrakes by dumping a unit of Wracks and a few Wrack upgrades and running a Spearhead.
I don't like your Wrack loadouts, I prefer the Liquifier Gun to the Ossefactor and don't think the Acothyst should have too many weapons, but if you're going to take anything I'd take an Electrocorrosive Whip, it's our army's best melee weapon imo. I've also seen another Coven player on the forum who's filling Raiders with two units of Wracks each with two Liquifier Guns a unit, and floating up beside enemy units to melt their faces. Maybe not necessarily the most optimal use of a Raider but seems like a ton of fun, and might be better than dumping all the Trueborn in one boat.
If you opted to deploy the Trueborn in Venoms, you could probably squirrel away enough points for additional Splinter Cannons by shaving Acothyst loadouts, but I don't have my book on hand so can't math that out properly.
The Talos is really, really, really slow when it's operating next to our transports, and I find it really lacklustre. Don't expect much from it aside from soaking firepower from players who oddly overestimate it and the occasional tarpitting and harassing of mobs. I don't play my Coven lists any more but in the last days of testing it out I just opted for a Stinger Pod and had the Talos Advance to get into combat as fast as possible. Like maybe I'm a fool to save 4pts for an Agonizer somewhere else but given how piddly Talos shooting is I'd rather just ram it up into enemy lines, enjoy whatever shots it gets off on the Advance, and go from there. That's just me, and my experience that Coven units really need to quickly get into close combat with the enemy because outside of melee Coven units are basically doing very, very, very little to affect enemy target priority, and our enemies aren't exactly shaking in their boots just because some Drukhari decided to start bench pressing, cut their noses off and wear steel plates over their faces.
Anyways, in an erratic mood, so there's a bunch to chew on.