well the way I see it, you're both right. if we increase the resource generation, we have to increase the spending as well. Lyth made a good point about having both resources be equal in both power, generation rate, and spending rate, but Shao makes a good point too about the current implementation leaving us with only big burst attacks to spend during burst windows instead of spending in a consistent manner.
I think if 6.0 DRK were to have its generation buffed to STB levels, we might have to introduce costs to some of DRKs currently costless abilities, which could potentially make it too ridiculous. if we go with HW levels, we would need to receive new abilities that don't cost any resource to balance out what Lyth said (since we can't really make any non-spending skills out of our current kit without making TBN free, which would ruin it imo).
lets say for example:
CURRENT Mana Builders: Syphon, Stalwart, BW, Delirium (4 tools)
if we consider Syphon and Stalwart to be our 2 "consistent" builder tools, we could convert BW and Delirium into our 2 "burst" builder tools. If Delirium is changed into a bunshin-style ability that gives us stacks that make certain skills into multihits, then we could change CnS and Quietus to have lower potencies with inherit mana generation, so that Delirium could give us big bursts of mana back. if we change BW into bunshin stacks as well, then it might have to have its mana generation buffed to compensate for the extra spending, or maybe even post lv 80 via trait if a new spender is introduced.
PROPOSED mana spenders: Edge, Flood, Abyssal Drain, TBN/Shadowskin/Dark Arts (4 tools)
If we are to introduce more spenders, such as bringing abyss drain back, and implementing shadowskin at lv 30, we could potentially make use of increased building from syphon/stalwart at early levels, BW/Delirium for burst windows, as well as making sure that we have a matching number of building tools and spending tools. if there is no baby TBN however, we would either have to make a new skill that spends mana to correlate with our 4 building tools, or we COULD potentially reintroduce DA as a spender. IF TBN keeps the dark Arts proc, then we could introduce its baby version to keep in line with having 4 spending options; however, if TBN loses that proc, that's when we bring DA back as a spender, but I think this may be a little harder to balance due to potential potency increases making certain tools favourable over others. there's also the possibility of introducing a new mana spending tool post 80, but that might have to come with the aforementioned BW buff to compensate.
CURRENT Blood spenders: Quietus, Bloodspiller, Living Shadow (3 tools)
PROPOSED Blood builders: BW, Salted, Stalwart, and Souleater (4 tools)
I think IF we make Salted generate blood again, Blood might be in a decent spot in terms of having 2 consistent sources (Souleater + Stalwart) and 2 burst sources (BW + Salted) , but imo Blood Spenders shouldn't be used for "burst damage" aside from Esteem. Maybe Living Shadow could be changed so that Esteem copies our rotation 1:1 while consuming 5 blood per attack, but also generating 300mp per hit so as to bring back STB Delirium's 50blood -> 3000mp conversion value. we could even allow Bloodspiller to regain 3000mp under new Delirium as well, further emulating STB Delirium's conversion. perhaps a new skill could be introduced as an opposite version STB Delirium, where we could convert 3000mp into 50 blood to allow us to have Esteem available on demand? might fit in nicely for a burst window fix that the new Living Shadow would need in order to align with raid buffs.
Lastly, for DRK of the Azure, while I do agree that GNB and DRK should be a little harder to play/optimise due to the nature of their later unlocks, we all know that the existence of jump potions/story skips combined with DRKs HEAVY marketing as the posterboy for SHB means that a lot of new players will be drawn to both jobs, which means that their kits might be forever doomed to be casual friendly. who knows at this point.
All in all, you guys all bring good points. I'm just hoping someone at Square is reading all of this, because I can imagine seeing the current DRK (and SCH) degrade even further for the next xpac, which would just shatter my heart. if there's ONE thing I do want, it's for square to hire a dedicated tank and dedicated healer dev above all else suggested in this thread (and many others)