I would like to see a few talents be a bit more useful for warlocks:
Unholy strength: works with all pets and a flat damage buff instead of auto attacks only (imps have no auto attack).
Master demonologist: now grants 1/2/3/4/5% haste to both warlock and enslaved demon when controlling any enslaved demon.
Improved enslave demon: also increases max duration by 5/10 minutes (it can still break early as usual)
Soul funnel: health and mana funnel now also gives your pet +25/50% damage while channeling
Also consider:
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viewtopic.php?t=11474
viewtopic.php?t=12119
I am not sure if this should be under warlock or the suggestions forums!