Who knows, we will not know until next season, and will never know if we are good enough next season with th current team if we change it!
I think this team next season would do better than this season, as they are young, and had a season in the premier league. I also think there will be many teams worse than us.
Of course we will spend, but even this does not mean it will improve the 'team'. We could sight 3/4/5 top class players and still struggle. That is football. We did not change much over the course of the season, but we improved, gained experience and learnt quickly, and at times look a very handy side.