Viking Wrestling: Combat Glima

As a Tai Chi practitioner, I have become very interested in Combat Glima (aka "Viking Wrestling") over the years, and I have noticed its popularity growing among historical western martial arts groups. WHY I am interested in it is this: in many indigenous grappling arts the goal is to put your opponent on the ground while you remain standing. But very often in the grappling styles that emphasize this, both opponents go to the ground. Stopping sparring to reset frequently is a poor sparring practice, and if your sparring goes there all the time you should probably just include it in your sparring. The logical implication would be that if your main goal was staying on your feet in the first place, getting back to your feet should your main goal on the ground. That is Combat Glima in a nut shell:

This has a few ergonomic advantages over MMA grappling styles, which make it less injury prone and less expensive in terms of infrastructure (notice Glima mostly training on grass instead of mat$.) First instead of trying to drive the opponent into the ground or otherwise submit them, on the ground they are grappling to get up:

Second they are not trying to slam their body weight down on top of their opponent when they throw (because they are trying to stay on their feet when they throw like in Sumo, Muay Thai or Tai Chi):

Even in Tres Espadas there are critics of Combat Glima, "I have done grappling before, and I think that Combat Glima has poor technique." But all the above advantages still stand - so if the technique could be better, lets improve it!