You can still remove your skins with your skis on with both the clipfix and sts attachments. In fact, I find it easier than doing it with no tail attachment, because there is something I can grab with my gloves on. Prying off skins w/o an attachment with ski gloves on can be difficult. I really like ascension skins. Then again, they are all I've used.
As said it all comes down to technique though. It is definitely an acquired skill.