Hello, everyone.
I've been following Emerald as well as Diamond and Ruby Coins for awhile now. I think with current development in Diamond DMD it is time for Emerald to do something to attract more people into mining and owning the Coin which has tremendous potential. Change in Algo, more services and some marketing will be nice.
My two cents - I wouldn't change a thing, and would prefer that any new developer not change the basics of the coin either. This coin perfectly fills a gap other coins don't have covered. It's profitable enough to be worth while to mine, but not so profitable/popular that it gets pounded by multipools. It's easy enough to mine to make collecting several thousand easily attainable for anyone, but low enough reward that a couple thousand still have value.
An argument could be made that maybe POS could be added to it to increase it's value a little, but it's a great coin to mine as-is, so going with a high POS reward, or switching to 100% POS like Philosopherstone is contemplating would make mining it worthless. Why mine 100 or 200 Emeralds a day when you can just buy a mess of them and sit back and collect minting rewards? Is anyone still mining ZEIT? No, because it's pointless. But I'm not selling mine, because just leaving it in my wallet collects far more per month than I could mine in a year.
Maybe adding a small POS component, like 10% per year, would be a good idea to prevent a 51% attack, but more than that would change the coin too much.
I would argue that if people want to see more activity in the community, they should get involved and promote it. Making more people aware of the coin would be a great thing and probably drive the price up naturally. I've seen one or two posts about people accepting Emerald for goods or services - a commiserative coin about Mt. Gox for example. Bottlecaps has one or more vendors that accept CAPs for seasoning and sauces. These examples can drive demand. Getting a good website up would almost certainly drive demand - what exists right now is not going to get people interested. Promoting in other posts can drive demand. Hell, even someone pumping the coin in forums and chat rooms to dump their load of Emeralds can drive demand by making more people aware it exists, but switching the algorithm is not going to drive demand for the coin, and may drive people away.
As an example, I used to mine Diamond every day, and I'd get 10 to 15 per day. They switched to Groestl and now I can't effectively mine Diamond any more. I get 1 a day. One lucky day last week I got 3. Yesterday I got none. I'm done. I'll probably hold what I have to collect POS rewards, but I'm done mining it. And the current price reflects the coin's demand. It went from over 100k satoshi to 80k, and if they don't fix pool mining, I think it's going to go lower. Damn shame, Diamond was awesome. Now, if you don't have a rig with 6 GPUs, it's a waste of hash to mine it, because you aren't getting any.
Another example is Galaxycoin. That was a good one too, as it was. It used to cost 500 to 700 satoshi and it was easy to mine. A new developer took over the coin, changed it too much, and now it's worth 125. that was months ago and it hasn't recovered.
Emerald was all but dead a couple times, but it survives because it's good the way it is. Changing it too much in my opinion would be a bad idea, and if it goes as poorly as Diamond is going right now, the change could kill the coin.
That's my thoughts.