ok prince I'll try to shed some light on this topic for you because I think I understand where you are coming from. First off rooting isn't for everyone and depending on how you use your phone and how much of a geek you are about this stuff it might not be the thing for you. That said, here's some things to consider.
The experience you are having with this phone isn't going to be common with all. This phone lacks in a huge way as far as the amount of attention it gets from developers and the amount of tweaking and roming that actually goes on. We have still yet to have one fully functioning rom that wasnt built off stock, including while we had gingerbread. If we had a fully custom built rom like cm9 or aosp or some other you would see more difference in performance.
That being said though, to give you a good idea of what a rom can do for you, take your spectrum and go back to V4 stock on gingerbread, then root and it and put CWM on there and flash broken out 2.0 Some of us were here when that all took place live and let me tell you, there was a huge difference! AND I MEAN HUGE! Battery life was better, it charged insanely fast, you could overclock which made the phone snappy as hell, the whole experience just blew stock away. This phone could barely break 5000 in antutu when it first came out, and broken out 2.0 took it well over 7000. Some people even scored near 8000. you are talking about a huge increase in performance.
Things are in an awkward stage right now for the spectrum, give it time and you will see the benefit of rooting. As has already been mentioned, the amount of tweaks you can make while being rooted is amazing. You just have to learn what it is you want, and put it into practice. One huge benefit for us right now being on ics and having root with CWM is being able to get google now, which is JB only. I personally love google now and use it quite often now. I used it twice today to call places I don't have in my contacts and it saved me having to look up there number because i can tell google now to "call such and such place" and it just does it. No extra steps, no mistakes, finds the number instantly, and calls it for me. I did this while driving down the road. Good luck with using google now on stock ICS...because you cant
there are also other apps you can run on a rooted phone with cwm that you can't on a stock phone. Like a lot of the stuff that is being ripped off the latest 4.2 version of android and converted to work on older versions. Like the 4.2 keyboard, and camera, and gallery to give a few examples. You can tweak boot animations, status bar icons, change the system font more easily. You can use root browsers to go into the system folders and reconfigure files and delete certain things. Like I said before it's about how much of a geek you are about this stuff. Root just unlocks your phone so those of us who want to risk breaking it have that right. It gives you control and access to the phone you paid good money for. It's about freedom and choice.
Basically it's a hobby for a lot of us. We like to tinker and change things. Like I said before this is an awkward stage for the spectrum right now. If you really want to see the benefit of rooting then do what I said before. Take your phone back to v4, then put broken out 2.0 on it. You will see.
