Will replacing the sear and sear spring/disconnector make this trigger to easy to pull?
Not trying to be pickey so I'll answer yes and then qualify. ...
The basic target hammer that you spent abut $30.00 for, will give you the most noticeable difference in trigger pull. You went from about 6+lbs., to roughly 2.5lbs. However, this just gets you a good start as it still won't address the creep, smooth let-off and over-tavel. You went in deep enough that you could have honed the sear and disconnector. Then you could have spent a little time, honing the bite on the hammer. All of this will improve your trigger job.
Be Safe !!!