How receptive is the user base to sudden, massive sweeping changes to the user interface that now make it resemble a website they might hate

How receptive is the user base to sudden, massive sweeping changes to the user interface that now make it resemble a website they might hate
i am once again (actually for the first time but shh) recommending xkit rewritten to make browsing tumblr about 200% better :)
Tumblr mobile sucks but I'm so glad I don't have to experience this