Guys - I want to point out - AVALANCHE has a canon in universe history.
We can safely assume the remake will be part of the compilation (and may even result in remakes/rereleases of other compilation titles).
AVALANCHE was originally founded as a terrorist group and they were not above targeting civilians. Their first mission was to destroy the Mako reactors (just as in the original game). In BC the Turks stop them, emphasizing the civilians deaths that would result if the Reactors blew and how power would be taken out for a large number of people - causing further harmer.
After the reactor mission fails, AVALANCHE's next major attack is in Junon where they attempt to hijack the Junon Canon and fire it on Midgar. Other notable attacks including sabotaging Shinra's Rocket Launch - which is why Sherra didn't notice the damage until so close to launch - it was recent sabotage (I think sabotaging the rocket launch is morally equivalent to the OG's group sabotaging Shinra's attempt to use the large materia to counter Meteor - Shinra's doing therefor we must oppose it).
Then - as in the OG - AVALANCHE's goal was to stop Shinra by blowing their stuff up. Although the previous incarnation was more willing to have civilian deaths - reasoning that if they don't stop Shinra the whole planet dies. The original AVALANCHE were not evil - they were heroes and mirrored the OG's group. Elfe was an escaped experiment taken by Hojo after Shinra destroyed her home town, the experiments gave her Super Soldier abilities but left her with memory issues. Shears was an anti Shinra fighter who joined the group, Shinra killed his family and destroyed his home town.
However, that AVALANCHE was thrown off course by Fuhito - who decided he wanted to destroy all life on Earth because humans inevitably destroy the planet - the only way to save the planet is to return everything to the life stream and start over.
This is where Barret comes in (and for sake of ease I'll quote the wiki)
A second, far smaller, AVALANCHE is created in Midgar by Barret Wallace, a former citizen of Corel. After Corel was destroyed and several AVALANCHE members defected the organization, Barret met up with one such member in Cosmo Canyon and was told of the ideals that drove AVALANCHE and their goals before being taken over by Fuhito. This gave Barret the incentive to form a resistance group of his own (it's unknown whether this was after the full destruction of AVALANCHE or not, but it is likely due to the timescale and implied injuries Barret sustained from Scarlet).
Although having some fundamental disagreements with Fuhito, Barret takes up the fight where Fuhito left off. On December 9, εуλ 0007, AVALANCHE bombs the Sector 1 Reactor, killing an unknown number of civilians.
It's possible the plans to blow up the reactors were based on the original AVALANCHE's plan.
So given that Barret's AVALANCHE took up the name of the original AVALANCHE (as either a copycat group or split faction from the original) - it's pretty clear they are meant to be terrorists.
The point is - the difference between a terrorist and a freedom fighter is whose side your on. Plenty terrorist groups had nobel goals and saw themselves as fighting for freedom (ex) the IRA).
Another point is the difference between good and evil is how far you're willing to go. The original AVALANCHE would have destroyed the whole city of Midgar if that's what it took to stop Shinra. Barret's AVALANCHE didn't want to kill people if they could avoid it. But the game does a good job exploring the idea that in war the enemy because 'the enemy' rather than people. So instead of seeing Shinra employees as ordinary people, they're just The Shinra - enemies to be eliminated. Barret's arce is about not being so blinded by vengeance that he wants to kill everyone - but he has some real darkness to grapple with too.
I don't think we should white wash what AVALANCHE is to make them more unambiguous heroes.