the first suggestion is to enable the filtering options you get with a genre search even when you are doing a title search. or to just add to the genre search a field like the tag search where you write words that must be in the title.

the second suggestion is still about the filtering options you have when performing a genre search:

Extended Options
Show all manga
Only show completely scanlated manga
Only show completed (including oneshots) manga
Only show one shots
Exclude one shots
Only show manga with at least one release
Only show manga with no releases

you can only select one of these options but not all of them are exclusive.
in the many searches i performed in the past i would have loved having the chance to use the "Exclude one shots" option coupled with "Only show completely scanlated manga" or "Only show manga with at least one release" and also other combinations.

i would rework this field into something like this:

Extended Options

Show manga with any scanlation status
Only show completely scanlated manga
Only show manga with at least one release
Only show manga with no releases

Show manga with any publishing status
Only show completed manga
Only show ongoing manga

Show both series and one shots
Only show one shots
Exclude one shots

and you can select one option for each of the subfields

my suggestion about the lists:
i would like very much to have the feature to change the title of a manga in my lists with one of the alternative titles or even with a custom one if possible.

thanks.