Pete may approve it, but I am of the strong opinion Pete did not write Ian's stuff. At best he gave Ian a direction, "This needs to happen" and let Ian come up with the actual content.
Pete has a talent for balancing the low brow humor with story line, more intelligent humor, and seems to have a natural affinity for landing somewhere in the middle so that one particular joke doesn't completely overwhelm a strip. Ian does not have that.
As other people have mentioned, Ian's MITDS is a lot like Bruno the Bandit.
That's great, if you like Bruno. Truly, I respect that people like that. I'm not trying to say that Ian sucks in all ways.
But I don't like his interpretations of the Sluggyverse. I like Sluggy, and I think Pete is a uniquely talented cartoonist. I don't like it when he takes an established Sluggy character and has them do things that just isn't interesting or funny. Sam, for example. Pete has a way with Sam that makes him kind of like that bumbling, obnoxious next door neighbor on your generic Sitcom that does something good just often enough to make it hard to actually hate him. But when Ian draws Sam, there's nothing good there. He's just a schmuck. And not even a funny schmuck. Just a boring one. And Lysinda? C'mon.
The Sluggy universe is better than what Ian has to offer it.
If I were smart, and could remember to just not click on my Sluggy link on Friday night/Saturdays, I'd just not care. But I never remember. I always end up reading the strip in horror, praying one will be funny.
At least my prayers were answered once.
-- edit: Fixed a typo.