I am a bit disappointed by your suggestions but thank you anyway. I already make use of the keyboard shortcuts you mention. But if I didn’t consider it a problem, I would not have asked about the possibility.
I use Web Searches for 184 dictionaries, 34 library catalogues, 11 research tools as well as other things. To this can be added several workflows that are based on search queries. It means that I use Alfred searches in my research several hundred times a day. A huge proportion of this searches is performed through invoking Alfred, returning to the beginning of the line and changing the prefix. This in itself is enough for me to advocate for implementing the optional suffix-model.
The suffix-model would allow not only to modify the search keyword more quickly but also to be able to use all the suggestions. Example: my prefixes for dictionaries are coded as `{;}{first letter of language 1}{first letter of language 2}{first letter fo dictionary’s name}`. For instance: `;aew` for Arabic–English WordReference. It allows me to first choose the language pair and then cycle through all available dictionaries. Now, having suffixes would allow me to use this extremely helpful cycling feature also while the word is already in Alfred search box. Believe me, I never choose a dictionary BEFORE knowing what word I want to look up.
Moreover, having suffixes would allow having a global keyboard shortcut for taking the text selected in Alfred and then choosing what to do with it, while taking advantage of keyword cycling and their easy replacement.
My prefixes always start with a special sign (for example `;` for dictionaries), so this problem can hardly ever occur. And one's keywords are all one letter, no problem, I propose this as an optional feature.
Unfortunately, not possible, because my keywords have between two and five letters and I don't feel like making them all five letter.