Hello there!
First, we would like to say that we really appreciate your feedback on the UCC27533DBVR part, at SnapEDA we're a small team of engineers passionate about making free and high-quality CAD models for engineers, and we are always working on improving our processes and standards.
We have reviewed your comments and we would like to hear your opinions about it:
1. For the body length we use nominal values for the body outline of our models since our users have indicated their preference for the nominal basic measurements; also our default is IPC-7351B which requires the nominal body. However, we plan to add other densities soon and we are open to ideas, is there a better approach you suggest?
2. As you mentioned, we currently use the default proportional style, this is because this is the default in Eagle. For this case, our team will definitely evaluate moving into the vector style as per your suggestion.
3. Regarding the "tplace" lines, we try to conform as much as possible to the defaults used by the CAD tool and since most of the native EAGLE libraries use that value, we have also chosen to adopt that in most cases as our default; also, in some cases, we use 0.2mm for certain manufacturers. Could you please share some more insights about why you think it should be 0.3mm instead?
4. We make the calculations for pad sizes and pad location following IPC 7351B. However, we have heard this feedback from others who hand solder their components, so we will consider adding a "hand soldering" pad size option in the future to allow for this, and/or supporting the "Most" density option, which it appears would be more suitable based on your other comments.
5. For the pin 1 location mark, we make sure it doesn't overlap the pad and is near pin 1. However, we can totally see your point for tight boards and we will evaluate establishing a standard for the pin 1 location mark that takes this into consideration.
6. Our geometric center is normally based on the center of the body outline, on the mounting holes if present, or on symmetrical pads. However, we agree that we should add a center mark, we will evaluate adding it to the assembly layer, where do you think would be best to add it?
Finally, for future reference, if you want to report issues you can do so on the part page by clicking on Issues>New issue. We automatically get notified and aim to resolve any issues or questions within 24h. Your opinion is very important because it also allows us to keep improving so we can better serve you all!
Thanks again for taking the time to write this feedback, and feel free to reach out to us if you have any comments based on the above.
Have a great day!
Ana Trujillo from the SnapEDA team.