Suggestion for a potentially easy and practical feature:
It would be great to add support for multi-line comments in the filter system, using something like [/* ... */] or [ """ ... """ ].
Right now, comments only work at the start of a line with [!]. Personally (and I’m sure I’m not the only one), I often need to disable or re-enable a large batch of filters at once — especially when testing or doing searches. Multi-line comments would make this way more convenient.