If the escrow gets ill, it's the same problem again. You can't prevent everything. Paying an escrow a fixed amount once every 2 months is less work than making weekly payments to many addresses.
I don't know if paying an escrow a fixed amount once every 2-3 weeks will make much of a difference to avoid problems.
Our DM:
You could hold onto some of the funds, say pre-pay 2-3 weeks or so, provide a BTC address, and I'll top it off. Can relaunch both the 777coin and Bitvest campaigns, with 10% lower rates on all 777coin levels, and 15% lower rates on all Bitvest levels.
I agree 100% with The Pharmacist's comment above.
To remove the negative feedback I would like to see a system that prevents this from happening again if he gets sick/dies/whatever. And it doesn't seem like refilling escrow every two weeks is a panacea.