After only one year keeping bees I've come to believe that you should do something about those cracks, gaps and alternative entrances. The bees don't guard them much if at all - hive beetles waltz right in through them, and the beetles will hide in any spot that the bees can't get to. Before hive beetles it probably wasn't worth worrying about, but if they are a problem in your area maintaining a small single opening might help keep them out.
I am going to seal them. I have sealed most of it. I am waiting a couple of days to seal the rest. I will take a photo of it today and post an image.
I have not made an entrance yet. I am confused about which way to go with this. The options seem to be Top entrance, side entrance and bottom entrance. I would like to build an entrance where I could attach a feeder to it unless there is a disadvantage to that. I guess what I am looking for is guidance. I do, however, get a kick out of this smiley ------------->