You have to ask yourself this, as you keeping mentioning it. Why do you think that Asura is full of RMT? Could it be because there are more actual people there to offer to?
Why are highly established/veteran players moving from Shiva? I have around 12 of such players in my Linkshell (that I know of). A lot of which are recent.
Congestion issues get addressed. SE have done well on that part regarding Ambuscade and the doubling up of other instances. S
I understand Shiva is a place that suits you, because you have established yourself there and have 'contacts'. For a new player, however, it would be difficult. It is kind of like looking for a job, if you have no established contacts in your life, you are going to find it harder than someone who has. It is not easy to find people who connect with you, in real life, or in a game.
Asura /sea all