If it is any consolation, it is lovely! I love the colours and the look you have at the moment. Once it's done, it will look fantastic! Just keep at it and once it is completed, all your efforts will be worthwhile!
If you don't want a second sashing around each block because its not the effect what you want, can you not make new blocks and add them to try and get the look you want? You could end up with either a bigger quilt or 2 of the same and donate one to charity or give one away as a gift?
Best wishes!