IMHO I do not see the changes your contemplating as needed. I finish my trigger/sear contact points to a mirror finish after slowly lowering the trigger contact point so that a crisp light single stage trigger is built. The secure trigger control I do not understand. I do not touch my trigger until just prior to "letting-it-go".
I do understand the grooved target type of triggers you are referring to, but I see them more as a marketing tool than anything more. However...everyone has different preferences and likes so you may want to invest in a duplicate of your current trigger and give it a try.
I do think the wider trigger will cause trigger finger contact at a side pressure vs a straight back pull. I suppose one gets used to it on any given rifle and compensates accordingly. I do notice with my own shooting that the placement of my finger joint vs pad makes a difference.