Likely the only modification necessary is a front shaped like the one on the Type 8 and Type 9 trains which is the only major change required right now to make the vehicles compatible with the curves.
I don't think it is just the nose shape, but also the wheelbase and how long the un-pinched low floor can be that's the issue.
What would it take to get Type 10 to have two doors per side per low floor section? Two per side per end, (8 in total, both sides), versus the Type 8's total of only 4 low-section doors?
It seems like other systems, besides having square noses (with no door), have longer unpinched low floor sections between the center bogie and the front/rear bogie/nose, allowing them to have a longer, full-width low-floor section, which seems like a longer wheelbase (and longer turning radius).
In cities like Norfolk , Baltimore, and Minneapolis, it is easier to roll a bike, stroller, or wheelchair into the low floor section because you can roll forward to the other doors, instead of having to back out (or 360 turn) to get back out the door you entered
Other systems seem to pull this off by either having longer trains (simply stretching the train in the low-floor sections) or by at least placing the bogies farther apart (resulting in a longer turning radius that the T can't accommodate)