Have the matching Whirlpool version of this dryer. If combined with the low extraction of the washing machine then yes, drying times are going to be LONG. Even with my high final high speed spin Miele, it takes about 30 minutes to dry half load of mixed items. You may wish to look into getting a spin dryer to help remove more water before drying.
Personally I dry heavy thick items like towels on the line until they are damp dry, then pop them into the dryer to finish and fluff.
If you have not done so already, clean out the inside of the lint filter area, and up inside the venting duct. Depending upon prior usage you may even wish to take the back off and give the unit a good lint removal cleaning.
Best of luck
L.