You shouldn't have to give up or change anything to make people play your server. The people who play it, play it for what it is and that's generally what they enjoy. To change it wouldn't simply be to make it more or less difficult to play and thus more appealing, it would make it more like the other servers. Then you have to take into consideration that of all the other servers, 80% of them are near or damn near dead and players have consolidated to more populated servers, most players have even sacrificed their latency to play on more populated servers, or even kick out an extra 5$ a month for a Gaming VPN subscription like Battleping, lowerping or WTFast just so that their gameplay experience on such populated servers is as it would be on their home server (aka, west coast players moving to servers like LS and Atl, and vice versa).
Personally I don't foresee any "changes" that would really interest most players enough to want to basically restart and play completely differently than they are accustomed to already. There are so many servers out there, some long dead and some active to this day, that their residents have done so much in an attempt to diversify their server from the rest of the other servers, and Siege as it is now has that easily, it is if nothing else, a special little snowflake of UO. It is what it is, and for that you all play it. The server as I understand it is supposed to be a challenge to survive on, and there is an approach players have to take which is unlike normal servers that allows them to do so.