That still leaves my secondary point as uncontradicted.
There are many scans that show there were many people left on Earth,, Trunks even pushed Cell out of the city to avoid hurting civilians. The events within Trunks's own timeline heavily reflect the events that occurred with the Cell that came from another timeline and attacked the Earth that we saw in the Manga. Because:
a) The Cell whom attacked present day Earth had to sneak up on Trunks to defeat him and steal his time machine after realizing that the Androids were gone.
b) The Cell in Trunks's timeline was doing the exact same thing directly after Trunks murders Android 18 and 17. However, he regards himself as stronger than the two.
c) The Cell in the present timeline stated that he had to power-up in order to force them into being absorbed.
Conclusion: Regardless of whatever version Cell is had to absorb people in order to gain the upper-hand on the Androids. The one from Trunks's timeline obviously did just that before he recognized that the Androids were gone.
Nothing infers that Cell's battle power had changed from Trunks's timeline, so obviously he should remain the same.
&
Chapter: 355 (DBZ 161), P8.5
Trunks: “They’re also somewhat different from the androids I know…They weren’t as outrageously strong as this…Even I could fight them fairly well…”
Future Cell could be weaker than the present Androids while simultaneously being stronger than the future ones. Nothing is wrong with this.