In my opinion for what it's worth, there is no right and wrong, there is what you personally like, so there will always be differences of opinions in this kind of forum. My choices would be to shift the thermometer from the front to a side and put some plants on the back to hide the heater. Loose the fake coral and plastic wood and move to a more natural piece of bogwood on which you can attach some real plants. I can see a platty in there and coral is a marine in nature, so personally I don't think the two look right side by side, but as said before, if it's what you like, then it isn't wrong.
When you move the thermometer, don't put it too close to the heater, else you will get a false view of the tanks overall temperature