While I like the rules (both ideas) I'm not sure snipers would be that useful in SpaceCrusade and snipers don't operate well in closed environments like the inside of space craft.
The 12 squares away rule illustrates this nicely - how often do you have a target more then 12 squares away in Space Crusade? - I'll tell you; almost never.
The Space Crusade board sections are 12x12 squares and only 1 board section has a corridor that runs the full length of the board - so to shoot a target 12 or more squares away you'd need the target to be either standing at the far end of that corridor or for some else to have opened enough intervening doors between rooms, corridors across 2 board sections to open up that length of sight - and even then your enemies are most likely going to be standing closer than 12 squares away
but don't take my word for it - do some play-testing and see what works for you
Don't get me wrong, it's good to see some new weapon rules, especially simple and well thought out ones, but I'm not sure how tactically viable a scout sniper is going to be in-game
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~The ravings of a single mad Goblin is bad enough, but such a power-hungry, malice-filled creature as Mortis can never hope to be understood~