Improved Avatar damage both DPS and Blood Pact would really change things, we would get more invites as a ranged /magical DD than we do now, i.e an accepted general use nuker rather than the common no TP only most people seem to suffer from. Wards potency would help us out a great deal(personally after getting BP delay fixed, this is the fix I'd most like to see), I'm fairly hopeful for it because they've already fixed ward durations.
The problem with fixing spirits is they would just end up stepping on the Avatars toes. Want a nuke pet? We have one already. Tank/DD pet? got one. Support pet? Have it. The only unique use to spirits aside from us now being able to play AFK, is the light spirit alliance cures, but even this is only really useful if you happen to be the only healer in the group. With all the main roles already covered by Avatars, all there was left for our low level pets was MP management. Unless SE can create a new role for spirits a buff to them would be pointless, and will probably take a back burneruntil the job is fixed itself.
A gimmick update, like making spirits comparable to Avatars in nukeing etc. would not go like that at all.
Spirit update-> why are you using spirits -> "oh so nothings really changed" -> SMN in the same place with more pets to choose from.
-> no one other than SMNs care.
Avatar Damage update-> things die faster-> even bigger spike damage numbers-> we have something to advertise.
A damage boost would be a very visible buff as is, I still surprise some people on SMN when I make a mobs HP bar go away, with one Predator claws, and take healthy chunks off an NMs life, a good boost to Avatar damage would actually be the most notable buff to the job. We already have a rep as spike DDs, increase our damage and spread that rep further = more people bringing SMN to more things.Having said this the new BP delay JA could provide this boost.
It's not that I dislike your ideas, it's just when it comes to spirits all it would amount to is a side grade, unless they make them stronger than our Avatars(which I can't see happening). As a job we need arguably the most love, and even though it's starting to look like we're gonna get it, I'd rather they buff the things we use everyday, before looking at things like spirits.