(?<!\d)\d+\.\d+ should match the numbers at the end of the lines and yet it won't. What am I doing wrong?
(?<!\d) -> Not sure why you're doing this.
\d+\. -> Look for at one or more digits followed by a period. None of the sentences have numbers before the period, and if the previous section didn't exclude them, this would.
\.\d+ -> look for a period followed immediately by one or more numbers. This should get most of the trailing 0's, but you'll miss the ones on their own newline and following a quotations mark.
\.0\ -> If you only have a single character you'd like to remove, there's no harm in enumerating it.