Well. More legos can create more castle's and can be used in more different creativity ways to achieve much more. Totally agree, but also more legos increase the chances to step in one of them with your bare foot. As long I returned to classic club since ages ago and you could say i am new I don't know the actual stuff coding capabilities but i will just try say what I believe better.
Auto farm: it's big pass new person's or lower power level clans seems to be gaining advantage of it but actually will be quite the opposite, big clans will take most good spots auto farming while 2-3 person's would murder anyone in sight. Know auto farm also can be used to murder the ones that attack you.
However you could try bring clan instances like RB's and arena modified them accordingly so a small power level clan with good setups and preparation can take them. Lower level clans Will be able closing the gap this way safely as long they manage things wise.
More skills: it's personal taste but archers got some good looking useful skills more classes could get some, official or custom more animations and Legos can help a lot on this.
Bugs : I have encountered certain bugs at current client during Olympiad. Using shadow step making enemy stunned but your character remained stationary while wasn't under any CC also many teleportation of mobs around map and many things that has to do about movement bugs either with skills or simple movement. Tests if some or most of these problems got fixed because if it get the opposite way adding more in top of others that new Legos would equivalent to step on them.
Event's: new animations new events Etc i don't know how much a new client could help but i am certain that some instanced PvP events could be quite fun or whatever new you could bring.
Balance : while balance was never l2 strong point at this point certain players will choose remain away because their tastes can't be satisfied at all and even If you try being more official like there is two facts one official isn't doing quite well. Second official at this point had brooches agathion bracelet Etc and while thanks god you didn't bring all those things here, things like garnet was quite balanced as long you could fight a little against cc lockers etc. the huge difference between mage weapons enchant rates and fighters weapon enchant rates was also one example of this. Does a new client going to help you fight against balance problems through normal meanings ( no p2w, or whoever does cc first wins and anyone has cc now). Or the more chaotic amount of Lego increase will just make more chances to step in a Lego?
Elements: never fan of it, at classic was clearly better than the old chronicles that you farmed stone's to place at gear. But elemental necklace i believe will create bigger rng power gaps while the element grind at Dion will be unhealthy at this point while not top A even exists. But also entirely personal opinion
Well that's the things I believe should be promoted and given first as the opportunities of a new client to give. But I would like to hear how a new client could help in those more specific
