Frankly, they've changed so many things. First "adopt and go." Which was ... expedient but confused lots of people. Then tried to pick the better way of the old DL and NW procedures... which confused people again. Then changed which manuals things were in... repeatedly... which meant no one knew where anything was located. Then created and but now are deleting "supplemental" stuff... which never made much sense. Tried to make callouts the same on airbus and boeing and MD products... just for fun. Then gave us an EFB that couldn't search across manuals and in my experience couldn't find anything period. Now thank goodness we are gonna get a new EFB later this fall. At least no one will be confused as we will all soon be repeating everything we do in the cockpit over and over and over... while monitoring 2 UHF radios... and the interphone... and etc. Maybe the Safety System mechanisms at DL should look at our 4th floor for inducing errors and confusion! OFG