Yes, leave the copper in.
I'm a TekSavvy subscriber.
In due time, once enough portion (not necessarily all) of the capital costs of the FTTH network is being paid off, Third Party Internet Access (TPIA) fiber is definitely warranted. TekSavvy over Bell-intstalled fiber!
But it will take time needed for a small period of exclusivity (3 years? 5 years? 10 years? Not sure...) to at least partially pay off the billions capital installing fiber. Otherwise they might not bother to install fiber in Canada if fiber infrastructure installations aren't government-subsidized enough (like in other places, e.g. Korea) to permit TPIA competition more quickly. One condition is unlimited (no caps) to permit Bell to have temporary exclusivity.
Right now, this is the case -- there is no cap on Bell Gigabit FTTH. (good!)
I'm kinda okay with CRTC deciding something along the lines on Bell getting a small period of exclusivity on gigabit fiber deployments (as long as unlimited data), as long as they cede access to TekSavvy et al, after X years, as a condition of rolling out fiber more quickly. Tough balancing act...
It's a balancing act between making it unappealing for Bell to install gigabit fiber, versus getting all the TPIA gigabit goodness sooner...