You know what I would do with I-95 in the Philly area ? I would put I-95E on the NJ Turnpike and I-95W on the current I-95 through Philly , finally build the interchange on I-276, then use the remainder of I-276 east to rejoin 95 E & W. It's too bad noone thought of that before.Probably the reason is that we aren't supposed to have suffixed interstates anymore. The only reason I-35 does it is because the cities couldn't agree on who would get I-35 when they were removed.
If I-295's extended, what does that mean for its direction? Does one suddenly go from heading north to heading south?
Probably, it certainly wouldn't be the first time. (See I-270 Columbus, I-275 Cincinnati, I-265 Louisville, I-285 Atlanta, I-695 Baltimore, etc. for examples)
Or, the part on the north side of Trenton might be signed East-West.