Is this West Elm sofa the kind of thing you are looking for? Or even lower to the ground? http://www.westelm.com/products/4227534/?catalogId=52&bnrid=3918508&cm_ven=Google_PLA&cm_cat=furniture&cm_pla=Sofas_+_Sectionals&cm_ite=West_Elm_Baxter_Sectional_Sofa_Cotton-Rayon_Ikat_Print_Feather&adtype=placi_src=17588969&ci_sku=4227534&ci_kw=%7Bkeyword%7D

The blue is awesome (grey is too trendy)! The reason it stands out to you is perhaps because it's the only real colour there. Bring in the blue in a window treatment, a small appliance that sits on the counter, a pretty tray or area rug. Also, it is more appealing often if there are more than 2 colours - so right now you have a white and blue colour scheme - bring in red or orange or fushia - something from the other side of the spectrum (like you did with the yellow flowers but in a more permanent way)!

I understand wanting to keep the views from as many rooms as possible. However, how much time is spent in the bedrooms? And is the view visible the majority of time one spends in the bedroom? Consider that the most restful, secure sleep is obtained when the bed is placed opposite the entry door. That is not possible in any of your current bedroom layouts. Perhaps you should consider single solid glass French doors or windows flanking the beds opposite the doors rather than the large windows you show on the plan. Choice of doors or windows would be based on accessibility to a deck. I assume bedroom 1 and the office/bedroom have built-in bunk beds. I think the deck between the family and bedroom 3 seems inaccessible and a bit of a waste, and I wonder how one gets outside from the kitchen with the trash, etc. Do you have no plans to garage the vehicles?

You could install racking for both sides of the room, toys & clothes that aren't being used can go into large plastic containers with lids. The two bikes could be hung from the wall or ceiling. And yes, anything that doesn't need to be there, move it on. There are so many hooks and storage options available that it would be very easy to sort this out and by getting a lot of it off the floor.