Tattoo is good but it's not winning Eurovision good if it weren't for Loreen. That said, I think the contest has moved on and what worked in 2012 won't do as well this time round. The televote in particular has moved away from well-staged pop songs and, in my mind, into more personal entries that interact more with the audience.
Tattoo is staged like a music video, there's not one shot of the audience in it and Loreen does not interact with the camera at all. Compare that to Maneskin, Kalush Orchestra, Salvador etc. All of them made use of the live show rather than hiding it as much as possible. I don't think the televote will vote for this in droves (still top 5 but not top 1) so the winner this year will come down to how the juries rank the televote magnet songs, with Finland in prime position