That does look long -- I can see why you want to streamline it. You have a lot of time when they are older to add things in (like all those LA subjects). I just googled CLE and see that it's a traditional "full" curriculum. It could likely be pretty involved and intense, lengthy for each subject. So you're almost doing two full programs (FIAR and CLE).
If you really want to add LA topics there are many programs you can use that are gentle, short, and can be done a couple of times a week instead of every day. You can wait to add spelling and grammar until later. Writing can be done (for your oldest) through FIAR. Reading comprehension or any reading program can be eliminated unless your child isn't reading well yet or you have concerns in this area (just get library books and let your him read on his own, or read to him). So I would eliminate all of the CLE reading and LA, honestly. I don't know about the math. You need a math program, for sure, and CLE might be fine for that.
You can also eliminate the Road Trip and extra science, but it sounds like you really want to keep those in because your boys enjoy them a lot. So that's great.
You can eliminate the Morning Basket, at least every day. I do artist/composer study on Fridays (we start our day with it instead of the Bible story for that day). The other things you're reading can be read aloud at lunch or bedtime, or just let the older two read them on their own.
Those are just some suggestions to cut down on your school day! Also, if you eliminate many or all of those LA subjects (at least in this form), you are cutting way back on workbooks and your boys may not drag their feet as much.
"Ree-bee," Mom to United States Marine ds 20 * artist dd 18 * motion-loving ds 15 * piano-playing ds 10
"For Miss Minnie loved children and she loved books, and she taught merely by introducing the one to the other." from "A Consent," by Wendell Berry