Yes, there are a number of "two traffic lane freeway entrances" here, and no, there's probably no effective way of "bike laning" them. I suppose they could turn the solid line into two dashed lines, they way they often do through right turn lanes, but I don't think it's critical, because getting safely across these entrances is not difficult. You simply look over your shoulder and proceed if there is no traffic, and if there is, you can signal with your left hand and then go. Most drivers, in my experience, are bright enough to understand that the cyclist does not intend to enter the freeway, and so do not need any encouragement to slow down and allow the cyclist to cross.That said, most of the roads in the area that cross I-5 often require dealing with multiple lanes of traffic entering or exiting the freeway. Bike lanes are not striped through these interchanges - nor would there be a logical place to route them. Crossing I-5 can be a barrier to a potential commuter cyclists, if they are only comfortable on roads with bike lanes.
I suppose that might be an impediment to commuters, but anyone impeded by that is likely to be impeded by darn near anything. It's just not a very big deal.