Ok, the first thing everyone will tell you is get some dedicated transports (Raiders/Venoms). I'm not actually of the opinion that they're mandatory for every unit though, since the Web Way Portal took a hit in 6th ed, some will tell you that they are. They are, in any case, the obvious 'upgrade' missing from your list.
Aside from that, try out some of the other weapons.
Splinter Cannons are usually worth it for your Warriors. Your Wrack cost seems wrong, so you should be able to fit two Liquifiers in there should you wish, and most people would say do.
There's no point taking Trueborn unless you're going to make use of the weapons options - Blasters are usually favoured, though you could go for mass Splinter/Shardcarbines.
I don't think the Ancient Haemonculus is a particularly good investment, but if you are going to take one at least buy him some 'toys' too. A lot of the arcane options are suspect, but some are useful.