It's not so much because it's not the same, that is to be expected. I love Blesta's flexibility and security but I tried to add a configurable option for SSL's the other day, I assigned it all correctly as it should be but when I go to the product, the option wasn't shown. I tried doing it with a lot of different products (SSL wise) and it just wouldn't work. This was with GoGetSSL, which I've now decided to change over to TheSSLStore, which I see was built by a 3rd party or sponsored by them but now their site is down and I have a feeling the plugin could be outdated with no sight with it improving, the order form looks exactly the same from GGSSL to TheSSLStore.
Another thing that is quite annoying is that there are NO email templates provided for anything except system calls, I get that Blesta is a billing/support system but this is one major time-saver with WHMCS that email templates are provided from the get go without having to manually write them all for each product, i.e. a lot of copy/pasting required.
It's just strange lol, please don't take offense.
If you are going to release a feature, make sure the docs are complete for it before releasing it. You wouldn't see Apple or Microsoft release a new version of their OS without documentation to back it up, is all.