Ch 15 will be using 3 dB more than ch 18, so you may have better luck.I already have a hi-VHF antenna and preamplifier so a change to UHF is a problem for me. I don't have a UHF antenna pointed toward Hamilton and don't expect to receive it off the side - channel 18 was intermittent. More power on channel 11 would be better from my perspective but that is clearly not in the cards.
Still, CHCH is only applying for 132kW peak, when the allotment allows for 493kW, so there is room to ask for more.
This a part I app, and the comment period is still open. Feel free to expres your opinion on the CRTC website.