SvarCOM is still feature incomplete last time I checked, about two months ago. For example, the CTTY command was not implemented and if I am not mistaken, for example, DIR /S did not work either.
The KEYB utility, depends on its keyboard layout database which is built into its different KEYBOARD.SYS variants. I recommend you better use instead mKEYB which has a built-in database and it is impressively small in size and can be easily be queried for a list of layouts from the commandline.
SVED is supposed to be a minimalistic text editor, not a full blown one. Its file size is a testament to that, at about 6 KB in size while EDIT in MS-DOS 7.x is about 70 KB and E in IBM PC-DOS 7.x is near 107 KB. The MS-DOS 6.22 version of EDIT is essentially its QBasic editor which is huge at about 190 KB even without its help file.
As far as I understand, the limitation in SVED's size was imposed by the distribution media (floppy images). It would make sense for the developer of SVED to implement an optional loadable module, as a separate file, which could contain all more advanced and complex features that would be available if it is present on the same directory as SVED. In that way he could deliver a small basic version on floppy and when HDD installation comes, the complementary advanced options could also be thrown in without any fuss.