I guess what I'm trying to understand is my version of EasyTouch when you go to Set Up Lights only has 3 options - All Off, All On, or Sync. The current version that I would get with a new mother board has all the various color programs listed. Are you saying that with my existing EasyTouch mother board I could add ScreenLogic and would be able to operate all of the light functions. Pentair support advises any way I go I would require a new mother board. With that I could add ScreenLogic at a savings over the purchase of a new EasyTouch remote.
I can't compare to an older motherboard, but I'm sure Pentair knows what they are talking about - I'm sure the LED bulbs didn't exist back when your motherboard was developed. On the newest systems - when you go into the EasyTouch (and this is MUCH easier with screen logic) you define a light - then you tell it what kind it is. Once you define it as Intellibrite then your Screen Logic interface changes and you'll have direct access to select the color or color pattern you want from the bulb. Easy touch takes over the motherboard and instructs the relay to flip on an off the desired number of times. I'm guessing that what you are doing today with your existing system may just not be fast enough for the bulb to know which color you are going for. This is of course assuming whoever replaced the bulb did it correctly and there are no other wiring issues.
You are correct as well, as the others mention and for my preference, I would replace the motherboard and add Screen Logic with the Wireless Connection option. You then get PC/MAC/iOS/Android apps - your choice (they support them all) to be able to not only control your equipment, but you can also do all of the programming from the PC/MAC version. You don't have to use the menus on the EasyTouch to do the programming. This may not be a big deal if you've had it for years, me as a newby to the product last year - Screen Logic made having this system so easy and fun to work with.
If you and or your family has really gotten used to having that EasyTouch remote always located in a certain place, put a cheap refurbed iPad mini or iTouch where it is - it can run the app and replace the remote.
Saying all of this, would you get any more use out of the system than you do today? Don't know - that all depends on what you control today and what you might be able to control tomorrow. I don't know the number of aux circuits on the old board or how many actuators it can control. The newer ET8 can control 8 Auxiliary circuits, and 2 additional actuators along with the 2 main ones for the pool and spa. So if you've got other water features and want to automate them you could potentially add additional actuators, if you don't already have 4.
If you have a VS pump then Screen Logic makes it very easy to control what speed you want for normal circulation, spa, cleaning, etc.
So it boils down to if the existing system does everything you need it to except the lights, is controlling the lights worth it for that costs. If you get additional functionality from it then it might just make it worth it. Regardless, if you upgrade, I'd skip the new wired remote and add Screen Logic with Wireless Connection - unless you already have ethernet wired out to the pool house and then maybe you don't need the wireless part.