The team is not to prepare for war. Agreed that we only have a 1v1 or only in rare cases a 2v2 matches. But the teams are for the weaker members to gain experience. Tell me can you guide/help every member of Konoha?Ofc you can't. But what happens when you divide them into groups. You have 5-6 leaders. And every leader looks after their team. There would be activity in the village itself, and the teams participate in it. Everytime a member does a good work, points are awarded to the team. It keeps the team spirit build up.
Believe me when I joined Konoha I wished I had all these opportunities. But the higher-ups said its a waste. Now when I have spend such a long time in here, I understand their point. But believe me, now I see the after effects of not having a team. People eventually get bored and go inactive, or they go change the village in the hope of having more fun. I do understand the concept right now is obselete but it always builds up hope that WE have things to do together. It makes it possible to know each other closely and form a close knit group.
Well, its just an opinion/suggestion lol so don't bash me up for this please.