Stargate bad at Neutering its Villains?

[g.o.d]

That probably won't be used.

spoilers say otherwise. But

Spoiler:

it won't certainly wipe the Wraith out

[ussrelativity]

Well, the Wraith have been tending to linger around.

[Mister Oragahn]

Indeed. The Ashen could even have served as a reflection of Earth as an emerging new space power. Basically a "what we don't want to end up like" example.

Then you'd have the two opposing ideologies. Earth still young and opptimistic about exploring the galaxy and the Ashen, a little bit older and more callous and hardened by their experiences with the Goa'uld. So while Earth still sees the wonder and majesty of gate travel the Aschen have moved past that and now exist as a much more isolationist xenophobic culture concerned more with it's own survival as a fairly small and weak power than with exploring mysterious ruins and gaping at the wonders of the ancients.

You could even hope that having that contrast front and center "how the Aschen would do this vs how Earth would do this" would keep away some of the "the team tortures a POW/Plans Genocide" type plots from ever getting past the initial stages.

Leave the genocide and torture to the Aschen in other words, since after having been nearly wiped out/enslaved by the Goa'uld without provocation they're convinced the entire universe is full of evil aliens out to get them, unless they can get them first.

The Ashens equivalent of SG teams would have provided cheap and sufficiently balanced situations for each confrontation not to be an overkill in favour of the Ashens. Their agroeconomy largely employed stargates, so they'd clearly be able to move whole teams and establish outposts.

They'd probably be able to send transports through stargates, but their deployment and exploration of worlds would have been slow. However, the Ashens would have been poping here and there at any time, sometimes cutting the evac route through the stargate and preventing SG teams from retreating.

The main problem would have been their ability to destroy the Goa'uld.
I think it would have been necessary to say that they did it with a mix of classical weapons and some super poison, like the Tok'ra stuff, but capable to spread even more, like a virus, albeit short lived otherwise you'd create a situation where you'd be killing too many characters across the galaxy.

On mature symbiotes and larvae, these weapons would have been a menace both for Jaffa and Tok'ra.

It would have really been a great set up. We'd have seen more help from the Hebridans, or maybe saw the Hebridans be contacted by the Ashens to expand their Confederacy, since both races defeated the Goa'uld anyway.

We could have pushed the whole scenario up by saying that either the Ashen homeworld, or a well colonized planet was put under the effects of the blackhole.
In a way, depending on the choice initially made in the creative department, the Ashens would have been more or less weakened to some extent, and extremely outraged.

That act alone would have been used by the corrupt government to enforce a strict martial law and gain the near unconditionnal support of the population.
Think 9/11 or the Reichstag fire.

Still leave a pinch of hardened Goa'uld around, and the setting would have been excellent. Have SG-1 use more stargates than ships, and make more exotic looking planets instead of wasting the budget on copying the same CGI space ship model a gazillon times.

I'm sadened how they're going for the cheap and lazy 2D popcorn crap these days, with no more valuable standalone episodes.
If you check the Ori seasons, the episodes are almost entirely dedicated to that main arc and the Ba'al thingy, and the standalones were terribly few and horrible, wastes of money on all accounts, not even more brainy, to compensate for the overly action orientated main plots.

I just can't wait to see how they're going to neuter the future enemies. It's so predictable it's simply not making even the enemies interesting, which makes the whole picture even more simplistic and flat, tasteless.
Great enemies make great shows. It's been rather obvious, notably in the treatment the Wraith got, that this truth totally flew over TPTB's heads.

[Mister Oragahn]

Well, the Wraith have been tending to linger around.

Unexploited. In a way, if it's to spoil them for so long, just end the misery now with some more typical nonsense of late SG.

Spoiler:

Yay for the super duper weapon.