You would first need to define your context of the word convenient, so that when we increase the intensity of its meaning, we would know what you actually expect.
Let me presume the following expectations about the intensive context of the word.
- efficient: higher amount or more intense results, while needing lesser amount of effort.
- i.e., enter link description hereintense consequences, without needing intensive effort.
- expedient: can be executed quickly, conveniently, without much impediment to itself.
- expeditious: a more modern version of the word expedient.
- efficacious: successful in producing a desired or intended result; effective
Notes about the word expedient:
- The words expedient, expeditious, expedite are derivatives from the Latin "expedi-" ~to speed things up, be ready, on the go, unencumbered (ped => foot, etymologically common with Sanskrit pad).
- The most well-known early use of expedient is in 1 Corinthians 6:12 & 10:23 of the Bible -
all things are permissible but not all things are expedient.
- US usage of the word has skewered itself towards a more negative/selfish direction. US dictionaries list the expeditious/beneficial/speedy meaning of the word as "archaic".
The original meaning of expedient in the two verses in the Bible carries the connotation of
- quick and efficient results
- beneficial to the cause of the community without indulging in unnecessary expenses and efforts.
Lucky for us Americans, the words expedited and expeditious come to our rescue. However, outside the US, I believe you could still use the word expedient safely and closely to its biblical meaning.
Therefore you could say
This editing technique is expeditious, expedient and efficacious.
That is to say in a few words to mean "This editing technique is speedy, with low impediment to execute, saves time and brings self-benefits to the user, and has effective and efficient results that we desire."
However, to management circles, the two trigger words are effective and efficient, because these two words have been parlanced (bounced around in idiomatic speech). For example the phrase, the effective and efficient organisation. Therefore, to sell a technique to management, you would say
This technique is expeditious, effective and efficient.
One has to be reminded, that management circles have an ongoing infatuation with the phrase "efficiency is not effectiveness", where it means one can be efficient where the efficiency does not bring any benefits.
To a teenager or young adult, the trigger words are intense and the slightly out of fashion awesome and wicked. Such young folks love an intense measure of ambiguity.
This technique is awesome, wicked with intense results.