What ever you do, do not be so quick to do so. I had rhododendrons for all of my adult life. They are acid loving plants. A soil acidifier would help. For years I used Mir-Acid fertilizer. Once in early May, once in mid June, and again in early August.
The other critical thing that you need to do is to "deadhead" the plant. You have to remove as many of the old flowers as you can. If you don't, they will produce seeds and produce fewer buds.
Be careful removing the old flowers because the new growths or branches arise from the same place.
If your soil is not acidic enough, they won't bloom as well. They like the soil 5.2 to 5.8. The beauty of a Rhododendron is not in a perfect shape, the beauty lies in the number of flowers produced. You correct the soil acidity, deadhead the old blooms and I guarantee it will fill out and bloom like crazy!!!! 😜