I guess you couldn't be bothered to actually read the thread for opposing reasons.
When this hits, I suppose the biggest sellers in the TP store will be the Summon Skirmish Soldier scrolls (summon during combat) and--perhaps initially, at least--the refund scroll.
As this happens, it would be in Turbine's interest to retune content and/or create new content that "encourages" skirmish soldier use, essentially turning every class into a pet class (with horrible pathing and AI issues). It wouldn't take much, really--increase mob count and/or morale, make them hit 20% harder, whatever. In terms of store purchases, this ostensibly means increased purchases for all skirmish consumables like the refund scroll and shorten-command scroll.
On the other hand, I wonder if this could also decrease skirmish instance purchases only because using soldiers for PvE would be 'fresh' content, and perhaps players wouldn't mind running the same few skirmishes over and over for the leveling marks. Or skirmish instance purchases would increase; who knows.
From a purely business point of view, IMO, it would be in Turbine'
best interest to tune content this way, whether old or both old and new. Because the skirmish soldier mechanics are
already largely in place, development costs shouldn't counteract store revenues terribly. I would predict that the whole "advantage becoming necessary convenience" sweet spot for Turbine will be framed the same way the current Legendary Item system is: Maintain grind and investment levels just annoying enough and the PvE-soldier system 'useful' enough that the mechanics scrolls are constant top sellers.
Oh yay.