Many thanks for the options on reducing the lists to 1500 Pts.

What do you think of the below list. Its a list for random standard deployment and missions as per the 40K book. ie 2/3 are objective based games.

1 Tyrant, 2 X TL Devs, Hive Commander, Leech Essence, Paroxsym
2 Guard Lash Whips
3 Hive Guard
3 Hive Guard
1 Tervigon Catlyst, Clusters
16 Termagants
5 Warriors (LW/BS DS)
10 Genstealers (Tox)
10 Genstealer (Tox)

The thinking is warriors (via Hive commander) and genstealers outflank on +1 reserves hopefully turn 2 or 3.
Termagants provide mobile cover for Hive Guard and Tyrant/Guard Squad. Who if necessary provide cover for the Tervigon.
Hive Guard and Tyrant open up Vehicles
Tervigon holds objective/Camp with any spawn Gants.
Tyrant/ Guard and any gants alive help in CC with Warriors / Gens turn 3. Use Paroxsym on enemy units with characters.

I like the two 1750 pts lists but how would you achieve the same sort of structure at 1500 Pts? Ideally maintaining Warriors with LW/BS in both