The initial impression is that the engine is a lot less free-revving than before, however despite that the power delivery was abundant which i think the ignition advancement definitely helped a lot in that regards.

Now as the MIVEC timing was advanced (pushed ahead from 4k+ rpm to 3k or so in layman), it sorta filled in the gap between the 2-4k rpm when it comes to power delivery, and from observation, my rpm doesn't drop like a rock when my foot's off the accelerator - which would mean my power band/delivery is still being kept while i am not flooring the accelerator and it helps more especially if i am in an hesitation on my shifting if i want to upshift or not (and then downshift again once said road hogger is clear. yes i know i am lazy and generally i'm not suited for manual transmissions lol) after ending up tail gating a random road hogger on the fast lane while i'm speeding.

i think overall with the earlier MIVEC timings there would be plenty of reserves on power delivery as apparent in my dyno chart, there's still a LOT of room for improvement post 6k rpm as there was no significant signs on power loss at that point and as k3 explained before that our ecu mapping is only limited to 6500/7000 rpm so if you can have better delivery earlier you can better utilize the subsequent rpm's on better timings/mappings when previously you couldn't have done so.

On a rougher layman approach on observation, my fc shown on the car's meter cluster (yes yes i know it's not accurate and yes i use fuelly lol) was constantly over 10.x km/l despite driving like an idiot (testing ASC ma ) for the whole time with speeds on average being 120-160km/h under light traffic conditions with time being around close to midnight to 1am or so, traveling around subang > federal hw > loke yew > seremban highway > besraya highway twists > bukit jalil > seramban highway again > jln istana > mahameru > jln duta > jln kucing > mrr2

of course, there isn't without some minor drawbacks - as the free revving nature of the engine is gone, i kinda find the car a bit less fun to drive compared to before. the insane torque pulling on the first/2nd gears aren't as apparent as before which i do kinda miss them especially the funny 2nd gear wheel spins rofl.

not to mention the "lol mivec kicked in yo" on the 4k rpm was pretty much gone as well as the power delivery is very linear compared to before.
imagine the damn free revving nature of the engine (again do remember that i am using very low viscosity engine oil lol) and then the whole 4k rpm "mivec kicked in feel"

it isn't practical at all though for daily driving as you will need to keep your power band/rpm above 4k rpm as the power delivery is very low on especially the 3-4k rpm gap.
not to mention just as free the engine is able to rev, the rpm falls just as easily too when you ease off the accelerator

overall i'm a very satisfied customer/inspira owner just as everyone has under K3nnYkl82 's mapping
however i do feel that it definitely still have some room for improvements, or more specifically, tweaking for personal preferences