Anyone with experience of 15-85 (and ideally 17-55mm, too)?

When i had my 60D (and 30D before that) i used the 17-55 almost all the time. I did end up selling it to get the 15-85 as I wanted something smaller, lighter and with a quieter IS. The 15-85 was this lens and i never once missed the IQ of the 17-55. Id say, as do others, that the 15-85 is just as good IQ wise. What it loses is of course having f/2.8 but i felt everything else was in favour of the 15-85.

The only downside, and for me it was quite a pain, was lens creep. It was quite bad by the time i came to sell it. The 17-55 had none of this for me.

I went to full frame about 4 years ago so sold all my EF-S gear, but not before trying to buy another 17-55. I had two that were decentred and gave up, and got a 5Dmkiii lol.

Now i have a 80D i wanted to get the 17-55 again. I actually got it a few days ago. So far im not over the moon with it. Ive been using a 18-135 STM and 10-18 as my daily lenses, and have been over the moon with these, even thoug hi still have my 24-70 f/2.8 mkii.

I tried the Sigma 18-35 f/1.8 and couldn't get a reliable AF with it. Its very sharp when it does nail AF, but i had a lot of soft shots with it and had to give up.

So,  the 17-55. It has everything gi need, on paper, but ive not seen anything that makes it stand out IQ wise, over the cheaper lenses i own.

That being said, at this time of the year here in the UK we have a lot of gloomy days, so having f/2.8 and IS will be very welcome, and its these two features im missing on my other lenses so ill stick with it, even if it means not having stellar IQ. At least this lens isnt decentred.