Each time I walk a route I previously walked, I always see things that I missed the first time. There is a certain comfort level that comes from having 'been there and done that.'
I would never say it was boring or not worthwhile. Also, if you walk at different times of the year, say autumn versus spring, the entire environment takes on a different character and coloration.
On the contrary, repeat trips along the same route only serve to enhance your knowledge and appreciation of the route and the people along it. I have even had the strange occurrence of hoteliers and bar owners remembering my last visit...go figure!
That said, If you are not inclined to walk the
Camino Frances (CF) again, try another route. There are plenty of them. If you like the services and amenities along the CF, consider the Camino Portugues from Porto to Santiago. Or, consider the
Camino Frances with variations.
For example, this year, I am walking the (Winter Route) the Camino Invierno from Ponferrada to Santiago. The
Camino Frances leads you into Ponferrada, after Cruz de Ferro and Molinaseca. From the main albergue (Saint Nicholas) the route splits. You can continue on the Frances, or switch to the Invierno, simply by taking a different route from the albergue.
The Invierno route is some 38 km longer than the Frances from Ponferrada to Santiago, about two days walking. However, it avoids the crowding, bed races, and general over use along this last 8 - 9 days segment into Santiago. Many veteran pilgrims are complaining about this route, and the din increases each year. So, I thought to walk it personally so I can better advise regarding using it as a viable, and near parallel alternative.
Hence, I start from Ponferrada on 13 April and plan a 10-day walk to Santiago. Various walking plans exist to do this in from 9 - 12 days. I chose a 10-day plan based on advance reservations and daily distances. This works out to about 26 km daily on average. IIRC, the official Pilgrim Office distance is 258 km.
The reason for the Invierno route is that it runs along a river valley, at lower elevations than the customary
Camino Frances route. Thus, while you avoid O'Cebriero, you also mitigate the likelihood of snow and freezing temperatures. Hence, the term 'the winter route.' Then again, there will likely be MUD. I hate mud. but, nothing is perfect, and no battle plan survives the first shot fired in anger...
Hope this helps.