Congratulations, have fun.
Some questions and comments:
Are Brood creatures that are outside of Synapse range at the end of an assault that they won allowed to make a consolidation move to get back into Synapse range? It would be helpful to have that in the last paragraph of the Tyranid Swarms section.
I suggest making the Instinctive paragraphs come before the Relentless paragraphs as Instictive rules are refered to in Relentless.
When a swarm becomes Instinctive you remove all Blast markers, yet under the Instinctive description it says that they still accumulate Blast markers. Why?
Has it ever been suggested that Regeneration should just be a fixed number of DC per turn? To fit in with how Titans now only repair one Void Shield per turn? Just a thought, but maybe regen 1 DC a turn plus the ability to use Marshal to regen others like the Titans do now with Void Shields.
I've made this suggestion before but no where does it say that Mycetic Spores are merely counters that are not attached to any formation. Because they are listed under Brood creatures on the army list it might make players think they have to attach them to a Swarm. Although, would that be a bad thing? Or even given them a profile and making them a real unit?
A question that's always been bugging me, are Brood lords 0-1 per army or per Genestealer swarm?
Did no one like the idea of making the Nodes into a Wraithgate like unit?
What happened with regards to renaming Mycetic spores?
When are the Tyrant's wings getting clipped and the Vituperator getting removed?
(You know, killing two birds with one stone... sorry I couldn't resist 
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