On paper, it sounds good, but, I'm heavily skeptical on how this extension would really fair out...
Although....
1. Getting to/from the West Bronx was already easy from the Q44 since it already connects with a bunch of lines, the Bx40/42, Bx22, Bx36, Bx9....the only difference is that it's connecting with the Bx12. Not really that much easier, especially with the Bx12 being a literal hot mess of a route.
2. Lol...not that many people will travel to/from Queens to/from The Bronx or Manhattan and sit for 1hr+ on the Q44(including the driver change at Flushing) just to save a couple of bucks. Definitely not worth it. It's a literal waste of time.
3. Not really....the Q44 on the weekend, especially when there's roadwork and such is a real pain in the ass. The same goes for the Q50(but the Q50 is far more bearable than the Q44).
4. Yeah.....about that Q10 extension, heard that caught the axe. A LOT of people on both ends hated the idea and rightfully so, that was one of their worst ideas.
As for the Q44 as a whole, I'm actually of the belief that the Q44 shouldn't even go past Parkchester. Parkchester as a whole screws that line up bad when there's traffic. Yes, the Q44 does get decent passenger traffic at The Bronx Zoo, but that route between Parkchester and West Farms has done that route no favors, even with the SBS conversion.
Once that Q44 goes to Fordham, I'm never taking that to The Bronx. I'm certain that I can take the Subway to GCT for Metro-North or take LIRR to MNRR and get to Fordham faster than a number of Q44s.