First of all we need a talent to add the hamstring back to heartstrike,
second we need a situational movement speed boost(like 30% or something),
a new talent that would make runestrike only have a reduced chance to be dodged or parried (like 5-10%) and do more dmg than the usual and be avaible regardless of you parrying or dodging.
maybe a death grib that slows for 70% for 2 seconds? or stuns for 1.5 seconds,
and of course something to give us either more dmg than the tank part of blood, either by dmg or arp talents , still not as bursty as frost but more durable and have some edge on rogues, which none of the current arena specs have...
enhancing the blood parasite thing and giving us the blood worms with some good dmg or CC after some time
and Boosting dancing runic weapon but taking the tank part away(most epic talent ever now left to die.) and giving hysteria back to us(nerfed or splited between you and the target...)
and I'm sure I can have more Ideas and maybe you guys can have some Ideas too... its not like it was viable for arenas back then but I really liked it... Blizzard totally destroyed my favorite dps spec and well I was really excited with dark simulacrum(GREAT ABILITY ) but blizzard really disappoint me this time... :( they are making the specs rigid , see the UH dw thing, someone thought of that even if it wasn't supost to be that way he tried it and it worked... but then blizzard came and ruined it instead of just making it on par with 2h, not that I would ever use that, I'm a pvp'er that barely have the pvp gear but someone must be as disapointed as I'm for they ruining the blood spec...