I already knit... in my solo downtime >
I love soloing, but I also love grouping. If I only have like 1hr to play I don't want to waste 45min seeking a party when I could spend the whole 60mins knocking out quests or leves.
The beautiful thing about ARR is that it's not just catering to soloers, there's many different ways to get xp.
I loved FFXI's party focus but it was awful when I only had like 1hour here and there to kill and I wanted to make progress on my character with a very limited timeframe. It would be extremely rude to join a party after 30mins of seeking then suddenly have to go 30mins later.
That to me is a thing of the past; being forced to only make progression when you have 3+ hours to kill should be a thing of the past no matter how you slice it; but ARR will cater to all - you can party, you can solo, you can dungeon grind with friends or solo leves etc. With this flexibility I forsee great things. If you abhor soloing you'll always have the chance to group up with friends, there will be people that detest soloing just as much as you, so you won't be alone.
So let's not trash a side of the game you wouldn't enjoy; you have the option to not solo (novel idea, isn't it?)