First of all, at least for the Series, there won't be any trail studs allowed on the ice drag track. In fact, I can't remember the last time somebody showed up at a serious ice race with trails studs, and was allowed to race. Furthermore, the trail stud racer would be silly to try and run index, as the lack of traction would never allow for consistent e.t.'s.
As to the tracks getting chewed up more today at the Series than 20 years ago, that's not really accurate. Sure, the big sleds today make BIG power, but there aren't that many of them. I don't think there were 10 total "Big" sleds at the Series this year. Compare that to the Woody's Challenge alone back in the day, when you'd have 40 entries in the 800 c.c. mod class, each with 220 H.P. If you want to compare total HP going down a track over a given race weekend, I'd venture to say you had 4 times the amount back in the 90's compared to today. I've been at the past two Series, as well as most of them over the past 20 years, and the track's in Oconto Falls the past couple of years have shown relatively little wear and tear compared to the 1990's.