It turns out you can use the customiser to rename/dynasty shield, so hooray my engagement is restored!
You just need to find a family which doesn't have too many members (unless you don't mind that).
I guess I'll get the achievements this way before switching back to classic ruler designer. The expansion has been really great so far since doing this!
EDIT to respond to a post:
Why is it bad if someone cheats to get an achievement in a game? If someone else wants to cheat and I want to do the hard work, why should I care?
This is the thing I've not understood in this thread. A few people (myself included) have pointed out that not using the ruler designer is reducing our enjoyment of the game and that we can't use one of the new features due to it. It hasn't been an attack on Paradox or anything, and I've totally understood the gung-ho paradox defence on issues such as DLC, patches, pricing - everything that actually matters to people. Like I've totally agreed with fans wishing to defend their favourite video game company from criticism - I'm right with them. Since EU2 and CK1 Paradox has been my favourite company, showing me a depth of games that I'd never even assumed possible before. But this thread has had a few people take others' issues on something that doesn't even relate to them way too personally
A couple of examples of complaints and responses/end results on users:
Example 1 - Users complain about DLC model. No defence from other users. Paradox drops DLC model. No more DLC gets made, or only expansions. Updates are therefore much less frequent. Paradox fans lose out from the decision. Ergo: defending the company's business model to show them appreciation makes sense, as otherwise we could lose out on more additions to a fantastic game.
Example 2 - Users complain that Jews are underpowered. No defence from other users. Paradox reworks Jews, giving them a lot of extra bonuses and decisions. The game is unbalanced further, and Jews dominate the majority of the map. Ergo: defending the company's decisions here to prevent huge ahistorical outcomes and an unbalanced game benefits Paradox users as to keeping the product fun.
Example 3 - Users complain about not being able to use a feature. No defence from other users. Paradox thinks about resolving the problem. No Paradox fans lose out from the decision. Ergo: there is no actual benefit for the individuals telling the others to not voice their wishes in this situation. This is the situation we're in. If they change it, those that want it changed will benefit. If they don't, there won't be any benefit for anyone. There won't be a negative for the people that don't care (it won't affect them!), but there will be for those that do.
This is an issue which is only actually having an effect on a group of people who want to use Ironman and Ruler Designer at the same time. By saying things like "What's the problem?" or "Just don't use Ironman, it's simple", it's not hugely helpful. I understand that it's hard to listen to people having complaints about a product you thoroughly enjoy, but you must realise that people have already entertained your suggestions before they've even read you saying them.
Sorry, a bit rambly, and I'm happy using the customiser and ironman together. It's just that I don't understand why some people are so unfriendly to others on certain topics/issues like this. For game unbalancing stuff that will affect your own personal game, sure, I can understand complaining about changes that others are suggesting. But for something like this, it's a bit like "Well I don't care, so why am I even telling them to get over it/not to care themselves?".
PS: Thanks for the user who suggested that I used the customiser earlier. It has enabled me to lose myself in the game again, yay! Also note that there's no criticism of Paradox here, I'm not even saying that it's the wrong decision to disable Ironman with Ruler Designer. I'm just saying that obviously a few people are upset about it and wished it could be changed, and other forum users just saying get over it and stuff after each user makes like one post raising this point is a little harsh.