No more than one third of the points available may be spent on Nexus, Harridan, Hierodule, Hierophant or Trygon formations.

Drop this section:

"A formation may only return units to play if it started the game with
that type of unit. For example, if a formation began the game with
only Termagants then it could only return Termagants via swarming."

The only effect this "restriction" seems to have is that people will always take a single token termagant and hormagaunt for the Dominatrix at start, and at least one of each in a swarm. In other words if you take one token Termagant at the start you can spawn a dozen of them, but if you don't take a the token unit you can't spawn back any. (Possibly a token Gargoyle might be worth buying in this way if they drop to 20 points but they are also brood 2 so not nearly as attractive in the spawning role as Termagants).

Firstly, this rule seems to be lacking in sense if you are trying restrict spawning in a meaningful way(!), as you just take a token gaunt and the restriction is completely gone. I'm guessing it is an overlooked holdover from a previous version of the list where spawning was more powerful (i.e. involving rolling dice for spawning and being able to bring back AV's etc). In that old role I agree it served a definite purpose, but it no longer does so now. It looks and feels messy and unnecessary, especially during army design, and for new players who have to be told "always take a termagant and hormagaunt with your Dominatrix and at least one gaunt of each type in swarms".

Secondly, it also doesn't seem to make much sense in terms of fluff. Surely rallying gaunts should just come back to whatever Synapse creature is available (and especially a Dominatrix)?

Either make it a meaningful restriction (like you can only spawn back to the composition you started with), or drop it altogether. Given the lack of any real effect the rule currently has, and fact that the spawning criteria are much tighter than the previous list, I would advise just dropping it altogether. It just compromises the elegance of the list by adding essentially meaningless text to an army that has always had complaints about the length of special rules.

I still have mixed feelings about the 60cm MW barrage from the Dominatrix and whether this is really necessary... but accept I seem to be alone in this. It does give enemy a healthy respect for the Dom I guess.

For future versions, I'd suggest putting SC, Synapse and Energy Pulse on the 0-1 character upgrade ("Synapse Symbiote?").

Dominatrix - for this iteration leave as is probably. Something like what STM suggests might be interesting though. I really like the idea of forcing the Dom to have some gaunts around, making it a 0-1 upgrade for a synapse swarm (replacing warriors/tyrant in a swarm). If wanted Doms could be 0-1 per 3K or part thereof, or 0-2 like the Lictors, with one chosen as the SC.

Broodlord: 50 points and give it Leader, extra attack, inspiring and Commander? They are after all supposed to co-ordinate entire bug uprising armies. But don't really know what to do with it sorry I haven't used it.

Doesn't sound like it would get used? That's as now with commander and how often would he close enough and intermingled to use it? Cheaper at 25 (same cost as an Eldar Exarch) is better IMO.

I am a bit surprised by the 60cm attack on the Dominatrix, would have thought 45cm, but this would be a bigger change. Multiple AA MW bubbles would be too good, if you allow multiple Dominatrixes in any fashion keep the energy pulse and supreme a 0-1 upgrade to one. Having the Domintrix replace the Hive Tyrants or TWs in a formation does sound like a better option than now.

I would like to see Ravenors get FF6+, they have small guns built into their chests in 40k.

They have short ranged flesh hooks that grab their prey, which is the rationalle for the FF6+.

Trygons with FF 6+ do suck a bit right now. In 40k they a 6 shot ST5 AP5 weapon - doesn't that sound a bit more like FF 5+ - did it really break them before it was changed to 6+.