I have zero experience with a Tikka, so this is purely subjective.
I have owned quite a few Tikka's over the years. T3 stainless in 30-06 and 300WSM. A CTR in 260, and a SS/Laminated T3 in 260. A T3 Forest in 260, and a Forest in 9.3x62.
Never fired any of them. Once I had them, I just couldn't like them.
I have little doubt they were accurate as people say. The triggers were very nice. Fit and finish were as expected.
But there was not a single feature of the rifles that made me want to keep them.
The bolts were slick for sure, like the Sauers I have owned. The triggers were nice like my Kimbers.
The stocks were acceptable, equal to a M77 Hawkeye.
The weight of the T3 SS was ok too, like many 700s I have owned.
I don't care much for the long action only thing, but as MD pointed out, there are advantages and disadvantages.
The thought of replacing too many pieces (recoil lugs, bolt shrouds, bottom metal, stocks) seems silly to me.
By the time you do that, you could have just payed a little more up front and got a more refined rifle (a Sako?) to start with.
I am not a hater. I have tried to like them.
Guess part two of my signature line says it all.
