You're argument is ridiculous.
First of all, they rarely run Hintz, Seguin, and Benn down the middle in the same game, the team has trouble enough scoring when they are loading up lines, when they dilute their talent across the three lines, they don't produce.
Second of all, Stars are going to start the season already over the upper-limit and using LTIR.
Even by your numbers, they will likely have between 4 and 6 million, and that is generous.
If they are bringing in Burns, they are trying to compete, so they need a legitimate back-up. There goes half of their space. Now they still only have 18 skaters. They need to add three more players.
Like I said, they could squeak under the cap using the Sharks model of icing a third of your team as AHL fodder, but that roster would be substantially worse than this years after letting all their UFAs walk.
You seem to think making it work with the cheapest pieces would be satisfactory. as long as they are under the cap, and you are not admitting that that team would have serious cap constraints.
How is that improving the team or making them better? And how is it not going to affect them the following season when Pavelski and Hintz are UFA?
Adding Burns is a idiotic idea for a team built the way the Stars are, yet somehow, you seem to think it will address their problems