Any tips before I commit to building? That annual failure rate seems pretty high
Use more Engineering Spaces and fewer Maintenance Storage modules. This is a bit more expensive to build but will reduce MSP consumption somewhat.
However, a large ship (and 30 ktons is a large ship) will have a fairly high failure rate anyways... as long as your maint life is in the right ballpark you will be okay.
Personally, I would keep the deployment time as it is. Some people here will tell you to keep deployment time, fuel time, and maint life as close as possible for an "optimized" design, but in my opinion these are not strong designs. At least how I play, ships do not spend 100% of their deployment sailing through space at full speed, often ships are holding position at a jump point or other waypoint ticking up the deployment time without consuming fuel. Having a fleet "on station" is an important strategic consideration which goes beyond the purely tactical optimization of fuel and deployment times to maximize tonnage efficiency in battle.
Other comments: for a ship this large, using only a bridge is wasteful, a large ship should have 2-3 officers in sub-command positions. Auxiliary bridge and CIC module are two important to have on a large combat ship to improve crew training and weapon accuracy, while main engineering is good to have if you can spare enough Engineering-skilled officers.
You do definitely have too much fuel...optimally, the ratio of engine mass to fuel mass is 3:1, and deviating from this ratio should usually be in the direction of higher engine mass to conserve fuel (reduce logistical burden). Here you have worse than 2:1 ratio. You can achieve the same performance and range with larger, lower-boosted engines and a smaller amount of fuel. I think 5x engines with 100% EP modifier and half as much fuel (basically, replace 2M litres of fuel with another engine) will give better performance, at the cost of some range possibly but you have plenty.
Otherwise it looks good. I might drop a Gauss turret for a few more lasers but this is personal taste. I would personally also be a bit antsy with only a single PD fire control, as I'm big on doubling up BFCs for redundancy in case of combat damage, but that's just me and I'm sure this will work fine, if your PD control is shot out you probably will not be saved by PD anyways.