There is a perception that the shorter the club, the easier it is to hit. However, this logic can only extend so far (no pun intended). For instance, there’s a reason your sand wedge is 35″ rather than 29″.
At a certain point, a golf club can become too short for you to hit with contorting your body into an uncomfortable address position. When a club is too short for you, the most common tendency is to bend over excessively. This can make it far more difficult to maintain a good posture when you address the ball, and a consistent spine angle for the entirety of the swing.
This is problematic, because when hitting balls with anything less than a full swing, knowing where your swing will bottom out has a massive impact on your confidence levels and your technical proficiency. A consistent spine angle can make it easier to hit down on the ball with a shallow angle of attack (good chipping technique), and establish a consistent ‘bottoming out point’. This is significantly better than stabbing at the ball with a steep angle of attack (and very little confidence in where the bottom of your swing actually is).
To put it another way, the longer the shaft, the less you need to bend your spine when you address the club behind the ball. Obviously a shaft can also be too long, but a 7 iron shaft strikes a good balance between long and short. I appreciate that there will be naysayers to this idea and I’m totally fine with that. All I’m saying is that hitting a chip with a 7 iron (ie the one that is currently in your golf bag) really isn’t as difficult as some people might suggest. You can stand taller over the ball, and this actually makes it much easier to rotate around your spine.
In other words, switching to a lob wedge with a longer shaft could actually be a viable cure for your short game woes.
Ultimately, if your short game is inconsistent and you struggle with making good contact with the ball before the turf, the overly short length of your current lob wedge might be a contributing factor. Conversely, if you are super confident over short chips and pitches with your current wedge setup, converting to One Length Irons may have limited benefits.