I had considered the current difficulty level of content before posting the idea. It was one of the main reasons I asked Dionaea to forward it.
The game itself, because of the way it is coded, already has a very high chance of killing a character in an instance where they would otherwise have not died. Line of Sight, getting ninja bunnied, people disconnecting or freezing mid-fight- any and all of these things can contribute to a high number of deaths or group wipes, none of which were preventable/under the character's control.
I think this statement deviated from your topic. If introducing sigils to the item shop is your way of solving the above listed problems, then that is really faulty logic. It's actually the one thing that most players dislike called a band-aid fix; you introduce something that patches over the issue instead of actually solving the issue. If you want to find a way to solve the issues listed above, I think that needs a separate thread with a separate set of solutions. It's not up to the players to buy items that serve as a band-aid fix for client/coding problems, which company employees are being paid to fix as part of their job. That's just wrong. X_X
There are multiple things that need to be paid attention to in the higher instances. A character has to watch their own health, pay attention to who has aggro (and on what), perform specific tasks, and also keep an eye on where the rest of their group is. A sigil is not going to save you from dying to an AOE. Or help you survive a debuff that is a guaranteed kill if you don't do what you're supposed to. A sigil's not going to help you kill three or more bosses at once. It's not going to prevent you from getting killed by multiple other characters in siege.
...A list of reasons as to why we really don't need sigils? I thought you were promoting its use, not presenting all the reasons as to why it would serve no benefit. xD This to me says that we're doing fine as we are without sigils in the item shop because it's not going to help anyone in the long run anyway and would be a waste of money.
I do agree with most of the people who have already commented. Sigils in the item shop doesn't serve any real purpose except to make the game easier than it already is. If the concern is for players that aren't endgame but would like to be, the solution is they need to play the game and keep progressing with their gear, same as always. Using a sigil to close the gap between mediocre gear and endgame gear doesn't make you endgame. However, it does promote laziness and it also says "You don't have to enter endgame to be endgame because last chapter's gear will be just as good as endgame if you use this sigil with it." And for those who already are endgame, its just another item that makes the game easier than it already is (which endgamers already hate).
There's a reason why sigils only last 2 minutes and are a chance find. If you want that boost to last longer and be more available, then scale all the game content, monsters, and instances in difficulty accordingly. Too much of a hassle to maintain a balance in the game in order to make this idea work. And no, sigils are not in the EU item shop and they haven't been for a very long time, and I hope that it stays that way.