[Dan296]

several.
i would, first off, split the 14 man crusader squad into two 7 man squads. also, 5 terminators in a 1k list? i usually dont like termies in such a small army, because that one unit is 1/5th of your army. for that same number of points you can have almost a duplicate of the 14 man crusader squad (dropping the powerfist or something.) as space marines, you will normally be outnumbered so taking terminators seriously cuts down your body count. also, in such a small game, theyre a big target as theres not other tasty targets like dreadnaughts or LRC's.
for the squad in the razorback, i would switch the plasma gun with a melta gun. that way, you can use that as a dedicated anti-tank squad. my friend has my BT codex with him right now, so i dont know if you can also take a multi-melta with crusader squads. if u can, i would switch the ML for that. if you go with this option, give the razorback heavy bolters so it can move and shoot, because the melta weapons are close range.
another option is to just drop the plasma gun and you can keep that squad far back and have a long range anti-tank squad instead of a close melta squad.
have your options open and know what you want to switch out if you want to take a different vow. for example, if you play an army with alot of psykers you obviously wont want "suffer not."
i like the marshal. good, hard hitting, relitivly cheap character.