of course a team will go through a long process to become stronger than what happened to them before. but additional players are the first option to improve the quality of the current team even we saw newcastle united also made a big improvement in the last summer window and it seems they are doing a better job now. West Ham will most likely be able to make improvements in the winter window because for now we see them to be in 16th place in the standings with a collection of points that are quite close to teams who are in the relegation zone.
Newcastle has always practiced well to improve teamwork which until now has been the key to victory for Newcastle, at least Newcastle has proven that they are capable of winning and there is still potential to win first place. It is likely that when the transfer market is open then Newcastle will try to add new players again to strengthen the team they have.