It sounds like your plant is a candidate for a practice known as disbudding. That basically means removing some of the buds so the plant produces less flowers per stem and the weight does not affect the look of the plant. Here is a short note from the American Camellia Society on the subject: "Disbudding: Disbudding accomplishes two things: it concentrates the plant's energy on the development of fewer flowers, and it regulates the position of the blooms on the branch so that each may open unhindered. Some camellias have a tendency to concentrate their bud set on the terminals of the branches instead of distributing them fairly evenly. In some cases this results in a mass of buds at the end of the twig and necessitates drastic action. It is a fairly common mistake to start disbudding too early in the season, which simply results in another crop of buds. Disbudding may be practiced from September to November. A plant with fewer flower buds will have a tendency to produce later flowers." Luis Here is a link that might be useful: Disbudding Info from the ACS

In cold Zone 6 in the NE, established/new camellias may sometimes temporarily loose leaves after very cold temperature drops, just like other shrubs do but they will leaf out later when temps warm up. But in Z7B, if there are no injuries, it would be a bit rare unless there were big dips. I have not had foliage issues due to temperatures as cold as 13F in January but, if a new, not-yet-established camellia did not have enough soil moisture before these wild temperature dips, it may have started leaf browning issues. Your big dips probably happened in Nov 22-23 ish; and Jan 21, 30-31-ish. The single digits in January of this year probably caused the problem for this shrub. Lack of sufficient soil moisture in the top 4" in a dry (warm or cold) winter may cause leaf drop. To prevent the loss of leaves and-or buds, I water deeply & mulch on the night before those very cold, wild temperature dips; or that you water on dry, warm winters where the soil has not frozen;.I maintain 2-4" of organic mulch. When I turned off the drip irrigation once during winter.... and forgot to turn it back on... I started to get browning of leaves during dry, warm, late winter months. Then, as blue bayou mention, there are leaf pests.... :o(... double sigh.... although they eat the leaves and not make a leaf suddenly turn brown without injuries unless a branch was eaten/damaged further below. Remember that this is a newly planted shrub so it needs to get water where the pot's potting soil is located. When watering, start near the base and water outwards around it and water only the soil, not the leaves. You can very carefully and lightly scratch some branches to see if you see "green". It should be time for leaf out this month. I suspect your are probably close to being done with frigid temps. Knock on wood!

It is flowering and it isn't horribly etiolated suggesting you're doing a decent job taking care of it. I agree that your plant will shed its older lower leaves as it grows but the older lower leaves don't look like they are on the verge of being shed to me. I've seen leaves bend to unusual angles when a succulent plant isn't getting enough sunlight. You typed that the leaves are droopy but are they droopy because they are shriveling away and no longer turgid or are they still fairly firm but just angled downward? Also, I see the older lower leaves are bigger than the newer younger leaves so I'm thinking maybe for a time during the winter the plant wasn't getting enough sunlight but now during spring the amount of sunlight has improved.

Hey, How long did you wait after watering to see if it would perk up before repotting and did you water after doing so? Did you flush with water or just pour on top? It might not be receiving water all the way through towards the bottom of the roots as wilting and droopiness can usually be from underwatering as there’s no water stored in the plant which helps to keep it firm! Does the soil feel moist still as the droopiness can be from overwatering too but it doesn’t seem to be showing any signs of yellowing, did the roots look healthy when you repot? Remember it has also just been pulled from soil and transplanted so may take a few days to pick back up.