Kaz,
I wouldn't recommend investing in charisma much if any at all. The increased drop chance from it is very very minimal, you're much better off increasing STR/DEX/VIT so that you can fight stronger monsters. Golems & howlers drop better items than easier monsters. Particularly, golems/howlers drop hauberks and chain hose which can be very helpful if you find them with physical absorb/magic absorb/hp regen/mp regen stats. These can be extremely helpful, and so they are not common drops.
As for changes to the bow requirements -- if anything we're thinking about reducing the requirements. Neither of those have dropped in the game yet though, so we'll think about it for now.
Exp rates: if we end up making any adjustments here, it'll take some time as this kind of thing takes a lot of scrutiny and testing. Not sure if you're staying with orcs because of the high-ish max exp the website shows. If so, the higher end is only for orcs that cast spells, the rest give exp from the lower end (10-30 or so). Orcs are fairly easy monsters meant primarily for lower level characters. At lvl 72 for a warrior, I would expect you would get more experience in a scorpion pit or graveyard in CL (far south, between the 2 Arbranau entrances, just above the road). The zombies & skeletons in the graveyard may not have the best drops, but they are good for leveling up.
For summoning, I can't seem to reproduce any problems. When you use the '/kill' command, it kills the summon, but you cannot summon another until the previous one is completely gone (not just dead, but has disappeared). Make sure you're casting it on yourself. Let me know if you're still having issues.
Guilds: the only benefit right now is that you have a private chat channel with all guild members. We plan to add more features to this in the future, but they're not going to be much use until we have a larger player base, so features here are on the back burner. Probably not worth the gold cost yet.
Lottery tickets are mostly there just for fun. There are a few rare items you can get from them, but odds are very low. Right now we're planning to keep the list a mystery.
ALT+SHIFT works when you have your cursor over an item on the ground, though I did notice an issue this morning that it didn't work if an entity was standing on the item (or laying dead on). We put out a small update this morning to correct that which seems to be working. Let me know if you're still having trouble.