Frankly, I always sort of liked that about medium plots, because I can simply ignore the small side spaces and focus on the front only with the limited items that I have, making the frontyard look less empty.

But I can see how not everyone prefers that and I was actually quite disappointed that all plots place the house in excatly the same place in regards to the plot.
I would much like to be able to pick - maybe only from a few options, it doesnt has to be 100% free - where I want any house on any plot.

Give both medium and small houses the L- and the U-shape option, aswell as one where the house is excatly in the middle of the plot.
Give mansions the option to either have the frontdoor across from the entery or be sideways to it. Give them a more L-shape option aswell - currently the only one we have is a large frontyard that can end up being sideways to your frontdoor, limiting your decoration-options.

But its not a call I'd wanna make for everyone! What I'd really like to see would be a few placement-options for each housing type, including L, U and center.