It's good that you feel this way but there are countless number of problems, I usually just ignore thread like these because of what's wrong with them. The only way you are going to revive clans and "competitiveness" is by getting an incredibly good anti-cheat that's better than badlion and good staff who actually know how to find hacks through screenshare. You're also going to need to get about A LOT more people joining the mcsg community to make clans.
If you're really looking for a good competitive clan community then your focus shouldn't be here. Badlion is the only server with that potential, if badlion had these forums and similar SG, and both MCSG and badlion community's were to merge, that's when you'd have the perfect clan community full of competitiveness. In my opinion, the only server I truly believe that has potential in continuing the legacy of clans would be Badlion. While MCSG still gets its normal 3000 people, badlion has gone from 2000 tops to 8000. Sooner or later, most people will be at badlion with their constant updates.
Too long didn't read; MCSG is going to need to gain about A LOT more players and an amazing anti cheat topping every server. Other than that, clans will never come back nor be the same level of competiveness, sooner or later clans will continue to disband and one day there will only be Spanish clans left. Due to badlion incredible arena pvp and uhc competiveness, once they acually perfect their forums and the very soon release of clan management, everything's going to change. mcsg maker is good but badlion will create something only centered around clans and actual competition. If badlion were to start a leaderboards and finally have their SG 2.0 come out, it will be huge. Looking at the amount of teams that attended the 5v5 tournament, this would be amazing. That's my one wish before I ever leave minecraft, to finally see a competive clan community again with no cheaters. My goal now is to pushing badlion to making that happen and I've made that my mindset when looking from all angles. Please try to understand everything I've stated and actually acknowledge it, I'm not sponsored by badlion rather I'm looking at it from all angles and that's the conclusion I've come to.