Using multiple LRM-5s to increase the number of potential hits hasn't been a spoiler since about 1984...
Actually, in regular game play (TT) there is no difference between the check LRM 5, 1-5 Missiles, 1 Check, LRM 15, up to 3 checks (1 per cluster of 5).
in THIS game, the check is made for a single missile, and only the first missile, so:
LRM 5 - 1 Check (first missile only)
LRM 10 - 1 Check (first missile only)
LRM 15 - 1 Check (first missile only)
LRM 20 - 1 Check (first missile only)
SRM 2 - 1 Check (first missile only)
SRM 4 - 1 Check (first missile only)
SRM 6 - 1 Check (first missile only)
Do you see what I am saying? Different from Table Top, where the check is made for each cluster of 5, or single SRM
So, in this version of battle tech, better to have multiple small tubes, than 1 massive tube.
in otherwords, I may go back and rebuild my ShadowHawk (which I converted from 1 LRM 5 to 1 LRM 10), to see if I can make it 2 LRM-5s