Making the spawning place safer
It has happened to me before that if one team is weaker than the other, it can come to a point when they camp the other team's spawn, killing them as soon as they appear again. This is not fun for anybody and making the spawn point more secure or not reachable by the other team could help prevent it (at least the original one, not the one you get by capturing the middle crystal).
if one team is overwhelmingly superior this will not do anything to help the situation in any way. because as soon as the player steps out of safe zone they will be instantly dead regardless.
this will only bring more frustrations when the teams are somewhat equally match. it'll be pretty much the same as arena safe where it could be use to cheap hit a person then run back to safety.
- Make the algorithm look at people's equipment, not just their level (or whatever it looks at). It is their SPs and weapons that make them op, not just the number. A person clv 45 with pve gear might be weaker than a clv 25 with pvp gear for example. (Update: in the current RCB, around 3 clv 45 on one team + around 5 clv 25 or more were against a few 25 and lower, so I have no clue how the matching works, I just know that it does not work :D)
this could be easily abused. a person with op eqs will just change tjheir current eqs to r0 lvl15 ones to lower their "elo" and get matched with enemies that they could one shot with their real eqs.
just hard level brackets enforced (like ic and ib) would be much better. of course the brackets should include clvls and not only normal levels like ic and ib do. and one last thing, someone with brain that actually plays the game would have to set those level brackets (cus ib level brackets are straight up stupid).
- This one might be a long shot but imagine this. If people were forced to use a certain SP or weapon provided only inside the RCB, it could close the gap between the levels and force people to use strategies more. Nowadays, usually people don't talk in rcb, do not work as a team, just randomly run around and try to do crystals. If there was say a minute at the start of each raid where you would be given a choice to use a fixed + and job SP and a fixed weapon, people might start communicating, asking which SP they would want, which elements or combinations to use to get buffs etc (since you only get to know your team once you are in).
i really doubt that would work as well as you think it would in terms of "communication" and "teamwork"
having fixed eqs and sps would certainly make it more fair but it would certainly not "force people to use strategies more". you're removing the part of strategy where a player has to consider their eqs shells and sp build and their other gear that fits their playstyle with certain sps.
also a player might be forced into an sp they dont like.