A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 100,417
It's a close call. CDN$3299 = US$2650 <yikes, I didn't realize that the exchange rate was so much different from 1:1>. Your 270,000 miles are worth a minimum of $2700 (by using pay with miles, for example), plus you paid about $150 in fees. However, the cancel/redeposit fee is $150 (except for PM and DM).
Did you already purchase the AS one way flight at the end? If so, can you get a credit to use for a different trip?
The purchased ticket would have a slightly better routing, but different aircraft types (no 1-2-1 direct aisle access seating or no true flat beds?) could overcome this advantage, as could schedule details, specifically arrival and departure times as well as connecting times. (No details were given and I'm not going to look up this information for the OP.)