Vrodman

The touch shifter for manual shifting in my 2000 E55 has always been WAY too sensitive. I expressed it to the steeler even shortly after I bought it but was told it was normal. It used to be if I stared it hard enough it would upshift. Now it's to the point that if I'm even taking a turn quick enough with my hand off of the shifter it will upshift all the way to D in an instant. It's pretty annoying for sure. I've heard the only fix for this is to replace the shifter module and that it's roughly a $1k job. Are there any other solutions to fixing this? If I should need to replace the shifter module, is it a DIY?

Any input on this would be appreciated. Thanks