The only thing you mentioned that people care about are the self roots. DH is an otherwise loved spec that lacks damage, period. Not everything needs fundamental design changes and not everything needs to be a boon giving spec. You can already give quickness with FMW but nobody takes it over Maw, why would they sacrifice even more damage to take a terrible trap because it gives quickness now? Certainly haven't seen a single opinion that DH F2 having a long cast time is a serious issue that needs to be addressed, lol
Also, DH does not have a low health pool with the new dragon stats, which you can take in large amounts due to RI. Parts of your post are blatantly incorrect.