Sorry, I'm going to disagree a bit with some of the comments here. While simple and functional (clean goes without saying) might be what we require from budget accommodation, the Airbnb market is so saturated in certain areas that there is a plethora of simple and functional listings out there, so you I think you have to offer something a bit extra to draw in the punters, and if it's something you can easily show in your photos rather than having to describe in words, all the better.
@Paul154 I think you have done a grand job with the bed. If I was a guest walking into the room, I would feel good because I'd think this host makes an effort rather than just doing the minimum. Sure, it's frilly and if you really hate frilly you could make it look just as nice minus the frills, like below, but the point is, the bed looks inviting either way.
I've said this a few times in other threads, but the bed is usually the most important part of the room, not only because it's where the guests are going to spend most of their time while they are in that room, but also because it's usually the largest and most dominant piece of furniture, so it's worth making the most of it. I am not sure if dressing the beds nicely increases my bookings as it's not reflected in my photos, which were taken when I still had lodgers, but it definitely makes the guests coo when they walk into the rooms.
Now, you have to decide whether the expense (and this includes your time) is worth it, but there are many other things hosts can spend money on that will have less impact.
What do I look for in budget accommodation? Something clean, safe, friendly, conveniently located and comfortable and ideally that means the bed must be comfortable. The mattress is more important than anything, but pillows are really a matter of personal preference. By giving your guests a choice of pillows and cushions as you have done, you are allowing them to customise the set up to suit them. I stay in a lot of 4 and 5 star hotels because of my job and while the mattresses are almost always good, 4 out of 5 times, the pillows are cr*p.